1
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Hodgson DM, Almohseni HAA. Evolution of a Cycloaddition–Rearrangement Approach to the Squalestatins: A Quarter-Century Odyssey. Synlett 2020. [DOI: 10.1055/s-0040-1707127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The highs, lows, and diversions of a journey leading to two syntheses of 6,7-dideoxysqualestatin H5 is described. Both syntheses relied on highly diastereoselective n-alkylations of a tartrate acetonide enolate and subsequent oxidation–hydrolysis to provide an asymmetric entry to β-hydroxy-α-ketoester motifs. The latter were differentially elaborated to diazoketones which underwent stereo- and regioselective Rh(II)-catalysed cyclic carbonyl ylide formation–cycloaddition and then acid-catalysed transketalisation to generate the 2,8-dioxabicyclo[3.2.1]octane core of the squalestatins/zaragozic acids at the correct tricarboxylate oxidation level. The unsaturated side chain was either protected with a bromide substituent during the transketalisation or introduced afterwards by a stereoretentive Ni-catalyzed Csp3–Csp2 cross-electrophile coupling.1 Introduction 2 Racemic Model Studies to the Squalestatin/Zaragozic Acid Core3 Asymmetric Model Studies to a Keto α-Diazoester3.1 Dialkyl Squarate Desymmetrisation3.2 Tartrate Alkylation3.2.1 Further Studies on Seebach’s Alkylation Chemistry 4 Failure at the Penultimate Step to DDSQ 5 Second-Generation Approach to DDSQ: A Bromide Substituent Strategy 5.1 Stereoselective Routes to E-Alkenyl Halides via β-Oxido Phosphonium Ylides 5.2 Back to DDSQ Synthesis6 An Alternative Strategy to DDSQ: By Cross-Electrophile Coupling7 Alkene Ozonolysis in the Presence of Diazo Functionality: Accessing α-Ketoester Intermediates8 Summary
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2
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Cativiela C, Ordóñez M, Viveros-Ceballos JL. Stereoselective synthesis of acyclic α,α-disubstituted α-amino acids derivatives from amino acids templates. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130875] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Xiao Q, Tang YF, Xie P. An efficient enantioselective synthesis of ( S)-α-methyl-serine methyl ester hydrochloride via asymmetrically catalyzed amination. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2020; 22:61-68. [PMID: 31311320 DOI: 10.1080/10286020.2019.1634058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 06/15/2019] [Accepted: 06/17/2019] [Indexed: 06/10/2023]
Abstract
We present the synthesis of enantiomerically pure (S)-α-methyl-serine methyl ester hydrochloride from 2-methyl-3-((4-(trifluoromethyl)benzyl)oxy)propanal and di-p-chlorobenzyl azodicarboxylate via asymmetrically catalyzed amination with naphthylalanine derivative catalyst. The application of the organocatalyst of D-3-(1-Naphthyl)-alanine is the key step in the synthesis and ensures the product is obtained with high levels of stereocontrol.
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Affiliation(s)
- Qiong Xiao
- Department of Medicinal Chemistry, Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation & State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Yi-Fan Tang
- Department of Synthetic Medicinal Chemistry, Beijing Union Pharmaceutical Factory, Beijing 102600, China
| | - Ping Xie
- Department of Medicinal Chemistry, Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation & State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
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4
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Sintim HO, Al Mamari HH, Almohseni HAA, Fegheh-Hassanpour Y, Hodgson DM. Alkylation of lithiated dimethyl tartrate acetonide with unactivated alkyl halides and application to an asymmetric synthesis of the 2,8-dioxabicyclo[3.2.1]octane core of squalestatins/zaragozic acids. Beilstein J Org Chem 2019; 15:1194-1202. [PMID: 31293666 PMCID: PMC6604716 DOI: 10.3762/bjoc.15.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/14/2019] [Indexed: 12/03/2022] Open
Abstract
(R,R)-Dimethyl tartrate acetonide 7 in THF/HMPA undergoes deprotonation with LDA and reaction at −78 °C during 12–72 h with a range of alkyl halides, including non-activated substrates, to give single diastereomers (at the acetonide) of monoalkylated tartrates 17, 24, 33a–f, 38a,b, 41 of R,R-configuration, i.e., a stereoretentive process (13–78% yields). Separable trans-dialkylated tartrates 34a–f can be co-produced in small amounts (9–14%) under these conditions, and likely arise from the achiral dienolate 36 of tartrate 7. Enolate oxidation and acetonide removal from γ-silyloxyalkyl iodide-derived alkylated tartrates 17 and 24 give ketones 21 and 26 and then Bamford–Stevens-derived diazoesters 23 and 27, respectively. Only triethylsilyl-protected diazoester 27 proved viable to deliver a diazoketone 28. The latter underwent stereoselective carbonyl ylide formation–cycloaddition with methyl glyoxylate and acid-catalysed rearrangement of the resulting cycloadduct 29, to give the 3,4,5-tricarboxylate-2,8-dioxabicyclo[3.2.1]octane core 31 of squalestatins/zaragozic acids. Furthermore, monoalkylated tartrates 33a,d,f, and 38a on reaction with NaOMe in MeOH at reflux favour (≈75:25) the cis-diester epimers epi-33a,d,f and epi-38a (54–67% isolated yields), possessing the R,S-configuration found in several monoalkylated tartaric acid motif-containing natural products.
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Affiliation(s)
- Herman O Sintim
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom.,Department of Chemistry, Purdue University, West Lafayette, IN 47907- 2112, USA
| | - Hamad H Al Mamari
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom.,Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al Khoud 123, Muscat, Sultanate of Oman
| | - Hasanain A A Almohseni
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom.,permanent address: University of Kufa, Najaf Governorate, Iraq
| | - Younes Fegheh-Hassanpour
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
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5
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Kim T, Matsushita S, Matsudaira S, Doi T, Hirota S, Park YT, Igarashi M, Hatano M, Ikeda N, Ham J, Nakata M, Saikawa Y. Total Synthesis of Pactalactam, an Imidazolidinone-Type Pactamycin Analogue. Org Lett 2019; 21:3554-3557. [PMID: 31058517 DOI: 10.1021/acs.orglett.9b00905] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of pactalactam was accomplished using substrate-controlled stereoselective aziridination and regioselective aziridine ring-opening to construct three continuous amino groups on an octasubstituted cyclopentane core. The cyclopentane framework was obtained by ring-closing metathesis and aldol coupling using a l-threonine-derived oxazoline compound. Cyclic urea formation, m-acetylphenyl group introduction by Chan-Lam coupling, and primary alcohol-selective acylation yielded the reported pactalactam structure. The presence of pactalactam in the fermentation broth of pactamycin-producing bacteria was also confirmed.
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Affiliation(s)
- Taejung Kim
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan.,Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Shohei Matsushita
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - So Matsudaira
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Tsuyoshi Doi
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Shinji Hirota
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Young-Tae Park
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Masayuki Igarashi
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki , Shinagawa-ku, Tokyo 141-0021 , Japan
| | - Masaki Hatano
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki , Shinagawa-ku, Tokyo 141-0021 , Japan
| | - Noriko Ikeda
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki , Shinagawa-ku, Tokyo 141-0021 , Japan
| | - Jungyeob Ham
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Masaya Nakata
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Yoko Saikawa
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
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6
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Xiao Q, Tang Y, Xie P, Yin D. Asymmetric amination of α,α-dialkyl substituted aldehydes catalyzed by a simple chiral primary amino acid and its application to the preparation of a S1P1 agonist. RSC Adv 2019; 9:33497-33505. [PMID: 35529148 PMCID: PMC9073532 DOI: 10.1039/c9ra06210f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/24/2019] [Indexed: 11/21/2022] Open
Abstract
The chiral catalytic amination of an α,α-dialkyl substituted aldehyde usually proceeds with low enantioselectivity. We selected naphthyl-l-alanine as the catalyst and observed improved enantioselectivity for the amination. Using this method, racemic α-methyl-α-benzyloxypropanal was aminated to give chiral serine derivatives in 74% ee, which was further increased to >99% ee after recrystallization. Moreover, we also successfully synthesized a chiral phosphonium salt 9 for the preparation of one α-substituted alaninol compound 14 as an S1P1 agonist in high overall yield. The chiral catalytic amination of an α,α-dialkyl substituted aldehyde usually proceeds with low enantioselectivity.![]()
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Affiliation(s)
- Qiong Xiao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
| | - Yifan Tang
- Beijing Union Pharmaceutical Factory
- PR China
| | - Ping Xie
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
| | - Dali Yin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
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7
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Almohseni HAA, Al Mamari HH, Valade A, Sintim HO, Hodgson DM. Alkene protection against acid using a bromide substituent: application in a total synthesis of (−)-6,7-dideoxysqualestatin H5. Chem Commun (Camb) 2018; 54:5354-5356. [DOI: 10.1039/c8cc02690d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkenyl bromide functionality survives several synthetic steps, including an acid-induced rearrangement, before a stereoretentive methylative debromination gives the natural product.
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Affiliation(s)
| | - Hamad H. Al Mamari
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Anne Valade
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Herman O. Sintim
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
| | - David M. Hodgson
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford OX1 3TA
- UK
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8
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Fegheh-Hassanpour Y, Arif T, Sintim HO, Al Mamari HH, Hodgson DM. Synthesis of (−)-6,7-Dideoxysqualestatin H5 by Carbonyl Ylide Cycloaddition–Rearrangement and Cross-electrophile Coupling. Org Lett 2017. [DOI: 10.1021/acs.orglett.7b01513] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Younes Fegheh-Hassanpour
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Tanzeel Arif
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Herman O. Sintim
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Hamad H. Al Mamari
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - David M. Hodgson
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
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9
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Granger BA, Brown DG. Design and synthesis of peptide-based macrocyclic cyclophilin inhibitors. Bioorg Med Chem Lett 2016; 26:5304-5307. [DOI: 10.1016/j.bmcl.2016.09.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 09/12/2016] [Accepted: 09/14/2016] [Indexed: 11/28/2022]
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10
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Panduwawala TD, Josa-Culleré L, Kuprov I, Odell B, Moloney MG, Claridge TDW. Scalar Cross-Relaxation Detected in the NOESY Spectra of Oxazolidines and Thiazolidines. J Org Chem 2016; 81:4142-8. [DOI: 10.1021/acs.joc.6b00458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tharindi D. Panduwawala
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Laia Josa-Culleré
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Ilya Kuprov
- School
of Chemistry, University of Southampton, Highfield Campus, Southampton SO17 1BJ, U.K
| | - Barbara Odell
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Mark G. Moloney
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Timothy D. W. Claridge
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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11
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Yoshida M, Sekioka N, Izumikawa M, Kozone I, Takagi M, Shin-ya K, Doi T. Total Synthesis and Structure Elucidation of JBIR-39: A Linear Hexapeptide Possessing Piperazic Acid and γ-Hydroxypiperazic Acid Residues. Chemistry 2014; 21:3031-41. [DOI: 10.1002/chem.201406020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 11/08/2022]
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12
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Jiménez-Osés G, Aydillo C, Busto JH, Zurbano MM, Peregrina JM, Avenoza A. Influence of Amino Acid Stereocenters on the Formation of Bicyclic N,O-Acetals. J Org Chem 2014; 79:2556-63. [DOI: 10.1021/jo500015c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gonzalo Jiménez-Osés
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095-1569, United States
| | - Carlos Aydillo
- Departamento
de Quı́mica, Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, UA-CSIC, E-26006 Logroño, Spain
| | - Jesús H. Busto
- Departamento
de Quı́mica, Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, UA-CSIC, E-26006 Logroño, Spain
| | - María M. Zurbano
- Departamento
de Quı́mica, Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, UA-CSIC, E-26006 Logroño, Spain
| | - Jesús M. Peregrina
- Departamento
de Quı́mica, Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, UA-CSIC, E-26006 Logroño, Spain
| | - Alberto Avenoza
- Departamento
de Quı́mica, Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, UA-CSIC, E-26006 Logroño, Spain
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13
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Aizpurua JM, Palomo C, Balentová E, Jimenez A, Andreieff E, Sagartzazu-Aizpurua M, Miranda JI, Linden A. Chirality-Driven Folding of Short β-Lactam Pseudopeptides. J Org Chem 2012; 78:224-37. [DOI: 10.1021/jo302368y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jesus M. Aizpurua
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica-I, Joxe Mari Korta R&D Center, Universidad del País Vasco UPV/EHU, Avda Tolosa-72, 20018 San Sebastian, Spain
| | - Eva Balentová
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - Azucena Jimenez
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - Elena Andreieff
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - Maialen Sagartzazu-Aizpurua
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - José Ignacio Miranda
- Departamento
de Química
Orgánica-I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal-3,
20018 San Sebastian, Spain
| | - Anthony Linden
- Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190,
CH-8057 Zürich, Switzerland
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14
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Olma A, Lasota A, Kudaj A. A convenient route to optically pure α-alkyl-β-(sec-amino)alanines. Amino Acids 2012; 42:2525-8. [PMID: 21847610 PMCID: PMC3351611 DOI: 10.1007/s00726-011-1055-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 07/30/2011] [Indexed: 11/15/2022]
Abstract
The cyclization of N-Boc-α-alkylserines to corresponding β-lactones under Mitsunobu reaction conditions and the ring opening with heterocyclic amines (pyrrolidine, piperidine, morpholine and thiomorpholine) produced N-Boc-α-alkyl-β-(sec-amino)alanines. The removal of the Boc group gives di-hydrochlorides of non-protein amino acids.
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Affiliation(s)
- A Olma
- Institute of Organic Chemistry, Technical University of Łódź, Żeromskiego 116, 90-924, Lodz, Poland.
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15
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Angelov P, Chau YKS, Fryer PJ, Moloney MG, Thompson AL, Trippier PC. Biomimetic synthesis, antibacterial activity and structure-activity properties of the pyroglutamate core of oxazolomycin. Org Biomol Chem 2012; 10:3472-85. [PMID: 22437843 DOI: 10.1039/c2ob00042c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Biomimetic intramolecular aldol reactions on oxazolidine templates derived from serine may be used to generate densely functionalised pyroglutamates, which are simpler mimics of the right hand side of oxazolomycin. Some of the compounds from this sequence exhibit in vivo activity against S. aureus and E. coli, suggesting that pyroglutamate scaffolds may be useful templates for the development of novel antibacterials, and cheminformatic analysis has been used to provide some structure-activity data.
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Affiliation(s)
- Plamen Angelov
- Department of Chemistry, Chemistry Research Laboratory, The University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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16
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Limberakis C, Li J, Balan G, Griffith DA, Kung DW, Rose C, Vrieze D. Complementary α-alkylation approaches for a sterically hindered spiro[pyrazolopyranpiperidine]ketone. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Remote Stereocontrol in [3,3]-Sigmatropic Rearrangements: Application to the Total Synthesis of the Immunosuppressant Mycestericin G. Org Lett 2012; 14:756-9. [DOI: 10.1021/ol203300k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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Sambeth GM, Süssmuth RD. Synthetic studies toward labionin, a new α,α-disubstituted amino acid from type III lantibiotic labyrinthopeptin A2. J Pept Sci 2011; 17:581-4. [PMID: 21644246 DOI: 10.1002/psc.1378] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 03/28/2011] [Accepted: 03/28/2011] [Indexed: 11/06/2022]
Abstract
The labyrinthopeptins are a new class of lantibiotics containing two identical quaternary α,α-disubstituted amino acids, named labionin (Lab). The synthetic formation of this unique structural feature represents the key step in the total synthesis of these polycyclic peptides. In this report we describe the synthesis of an orthogonally protected α,α-disubstituted amino acid building block serving as labionin precursor for the future assembly of labyrinthopeptin A2 and of other labyrinthopeptin derivatives.
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Affiliation(s)
- Georg M Sambeth
- Technische Universität Berlin, Institut für Chemie, Straße des 17. Juni 124, 10623 Berlin, Germany
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19
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20
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Anson MS, Graham JP, Roberts AJ. Development of a Fully Telescoped Synthesis of the S1P1 Agonist GSK1842799. Org Process Res Dev 2011. [DOI: 10.1021/op2000095] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael S. Anson
- Chemical Development, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Jonathan P. Graham
- Chemical Development, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Alastair J. Roberts
- Chemical Development, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
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21
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Anson MS, Clark HF, Evans P, Fox ME, Graham JP, Griffiths NN, Meek G, Ramsden JA, Roberts AJ, Simmonds S, Walker MD, Willets M. Complementary Syntheses of N,O-Protected-(S)-2-methylserine on a Multikilogram Scale. Org Process Res Dev 2011. [DOI: 10.1021/op100299d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael S. Anson
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Hugh F. Clark
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Paul Evans
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Martin E. Fox
- Chirotech Technology Ltd., A subsidiary of Dr. Reddy’s Laboratories (EU) Ltd., Unit 162 Cambridge Science Park, Milton Road, Cambridge CB4 0GH, U.K
| | - Jonathan P. Graham
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Natalie N. Griffiths
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Graham Meek
- Chirotech Technology Ltd., A subsidiary of Dr. Reddy’s Laboratories (EU) Ltd., Unit 162 Cambridge Science Park, Milton Road, Cambridge CB4 0GH, U.K
| | - James A. Ramsden
- Chirotech Technology Ltd., A subsidiary of Dr. Reddy’s Laboratories (EU) Ltd., Unit 162 Cambridge Science Park, Milton Road, Cambridge CB4 0GH, U.K
| | - Alastair J. Roberts
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Shaun Simmonds
- Chirotech Technology Ltd., A subsidiary of Dr. Reddy’s Laboratories (EU) Ltd., Unit 162 Cambridge Science Park, Milton Road, Cambridge CB4 0GH, U.K
| | - Matthew D. Walker
- Chemical Development Division, GlaxoSmithKline Research and Development Ltd., Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Matthew Willets
- Chirotech Technology Ltd., A subsidiary of Dr. Reddy’s Laboratories (EU) Ltd., PO Box 6 Steanard Lane, Mirfield, West Yorkshire WF14 8QB, U.K
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22
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Jeong YC, Anwar M, Nguyen TM, Tan BSW, Chai CLL, Moloney MG. Control of chemoselectivity in Dieckmann ring closures leading to tetramic acids. Org Biomol Chem 2011; 9:6663-9. [DOI: 10.1039/c1ob05816a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Tarbe M, Azcune I, Balentová E, Miles JJ, Edwards EE, Miles KM, Do P, Baker BM, Sewell AK, Aizpurua JM, Douat-Casassus C, Quideau S. Design, synthesis and evaluation of β-lactam antigenic peptide hybrids; unusual opening of the β-lactam ring in acidic media. Org Biomol Chem 2010; 8:5345-53. [PMID: 20927455 DOI: 10.1039/c003877f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
β-Lactam peptides were envisioned as conformational constraints in antigenic peptides (APs). Three different β-lactam tripeptides of varying flexibility were prepared in solution and incorporated in place of the central part of the altered melanoma associated antigenic peptide Leu(27)-Melan-A(26-35) using solid phase synthesis techniques. Upon TFA cleavage from the solid support, an unexpected opening of the β-lactam ring occurred with conservation of the amide bond. After adaptation of the solid phase synthesis strategy, β-lactam peptides were successfully obtained and both opened and closed forms were evaluated for their capacity to bind to the antigen-presenting class-I MHC HLA-A2 protein system. None of the closed β-lactam peptides bound to HLA-A2, but their opened variants were shown to be moderate to good HLA-A2 ligands, one of them being even capable of stimulating a Melan-A-specific T cell line.
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Affiliation(s)
- Marion Tarbe
- Université de Bordeaux, Institut des Sciences Moléculaires (UMR-CNRS 5255) and Institut Européen de Chimie et Biologie (IECB), 2 rue Robert Escarpit, 33607 Pessac, France
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24
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Gao X, Liu Y, Kwong S, Xu Z, Ye T. Total synthesis and stereochemical reassignment of bisebromoamide. Org Lett 2010; 12:3018-21. [PMID: 20527927 DOI: 10.1021/ol101021v] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A revised configurational assignment for the thiazoline moiety of the marine peptide bisebromoamide is proposed and validated by total synthesis.
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Affiliation(s)
- Xuguang Gao
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China
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25
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Anwar M, Cowley AR, Moloney MG. Novel chiral pyrrolidinone scaffolds derived from threonine with antibacterial activity. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.04.064] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Sulikowski D, Mąkosza M. Oxidative Nucleophilic Substitution of Hydrogen in Nitroarenes with Carbanions of Protected Serine and Threonine Esters. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000498] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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28
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Aizpurua JM, Palomo C, Fratila RM, Ferrón P, Miranda JI. Stereomodulating effect of remote groups on the NADH-mimetic reduction of alkyl aroylformates with 1,4-dihydronicotinamide-β-lactam amides. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.02.085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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29
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Jiang H, Paixão MW, Monge D, Jørgensen KA. Acyl Phosphonates: Good Hydrogen Bond Acceptors and Ester/Amide Equivalents in Asymmetric Organocatalysis. J Am Chem Soc 2010; 132:2775-83. [DOI: 10.1021/ja9097803] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hao Jiang
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Márcio W. Paixão
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - David Monge
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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30
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Li W, Gan J, Ma D. Total synthesis of piperazimycin A: a cytotoxic cyclic hexadepsipeptide. Angew Chem Int Ed Engl 2010; 48:8891-5. [PMID: 19839021 DOI: 10.1002/anie.200904603] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wenhua Li
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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31
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Li W, Gan J, Ma D. Total Synthesis of Piperazimycin A: A Cytotoxic Cyclic Hexadepsipeptide. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904603] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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ALTMANN EVA, ALTMANN KARLHEINZ, NEBEL KURT, MUTTER MANFRED. Conformational studies on host-guest peptides containing chiral α-methyl-α-amino acids. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1399-3011.1988.tb01269.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Jiao XZ, Wang LP, Xiao Q, Xie P, Liang XT. Total synthesis of (+)-conagenin. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2009; 11:274-280. [PMID: 19408153 DOI: 10.1080/10286020902828369] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new approach for the synthesis of the (+)-conagenin has been achieved based on Evans asymmetry syn-aldol reaction and the self-regeneration of stereocenters strategy.
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Affiliation(s)
- Xiao-Zhen Jiao
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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34
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Kudaj A, Olma A. A convenient transformation of α-alkylserines into α-halogenomethyl-α-alkylglycines. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.08.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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35
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Seebach D, Grošelj U, Badine D, Schweizer W, Beck A. Isolation and X-Ray Structures of Reactive Intermediates of Organocatalysis with Diphenylprolinol Ethers and with Imidazolidinones. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890216] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Palomo C, Aizpurua JM, Balentová E, Azcune I, Santos JI, Jiménez-Barbero J, Cañada J, Miranda JI. “Click” Saccharide/β-Lactam Hybrids for Lectin Inhibition. Org Lett 2008; 10:2227-30. [DOI: 10.1021/ol8006259] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claudio Palomo
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - Jesus M. Aizpurua
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - Eva Balentová
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - Itxaso Azcune
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - J. Ignacio Santos
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - Jesús Jiménez-Barbero
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - Javier Cañada
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
| | - José Ignacio Miranda
- Departamento de Química Orgánica-I, Universidad del País Vasco, Joxe Mari Korta R&D Center, Avda, Tolosa-72, 20018 San Sebastián, Spain, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu-9, 28040 Madrid, Spain
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37
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Di Giacomo M, Vinci V, Serra M, Colombo L. New fast and practical method for the enantioselective synthesis of α-vinyl, α-alkyl quaternary α-amino acids. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2007.12.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Kelarev VI, Koshelev VN. Synthesis of five- and six-membered nitrogen-containing heterocyclic compounds from carboxylic acids iminoesters. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1995v064n04abeh000153] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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An efficient synthesis of optically pure α-alkyl-β-azido- and α-alkyl-β-aminoalanines via ring opening of 3-amino-3-alkyl-2-oxetanones. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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40
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Aydillo C, Jiménez-Osés G, Busto JH, Peregrina JM, Zurbano MM, Avenoza A. Theoretical Evidence for Pyramidalized Bicyclic Serine Enolates in Highly Diastereoselective Alkylations. Chemistry 2007; 13:4840-8. [PMID: 17366514 DOI: 10.1002/chem.200601746] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new chiral serine equivalent and its enantiomer have been synthesized from (S)- and (R)-N-Boc-serine methyl esters (Boc: tert-butyloxycarbonyl). The use of these compounds as chiral building blocks has been demonstrated in the synthesis of alpha-alkyl alpha-amino acids by diastereoselective potassium enolate alkylation reactions and subsequent acid hydrolyses. Theoretical studies were performed to elucidate the stereochemical outcome of both the formation of five-membered cyclic N,O-acetals and the subsequent alkylation process, which occurs with total retention of configuration. This feature could be explained in terms of the high degree of pyramidalization of enolate intermediates.
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Affiliation(s)
- Carlos Aydillo
- Departamento de Química, Universidad de La Rioja, UA-CSIC, 26006 Logroño, Spain
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41
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Abstract
Halipeptins A-D (1 a-d) are a family of natural cyclic depsipeptides isolated from marine sponges. Total syntheses of these four compounds are detailed in this report. The key elements in this synthesis include the elaboration of the polysubstituted decanoic acid parts by two asymmetric aldol reactions, assembly of the N-methyl-delta-hydroxyisoleucine residue by using either aza-Claisen rearrangement or methylation of aspartates as the key steps, and macrocyclization at the polysubstituted decanoic acid alanine site.
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Affiliation(s)
- Shouyun Yu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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42
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Qi J, Roush WR. Synthesis of precursors of the agalacto (exo) fragment of the quartromicins via an auxiliary-controlled exo-selective Diels-Alder reaction. Org Lett 2007; 8:2795-8. [PMID: 16774259 PMCID: PMC2515626 DOI: 10.1021/ol0609208] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A direct synthesis of the alpha-hydroxyaldehyde exo-5, a precursor of the exo-spirotetronate subunit of the quartromicins, was achieved through an exo-selective Lewis acid-catalyzed Diels-Alder reaction of dienophile 12a and diene 1.
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Affiliation(s)
- Jun Qi
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109
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43
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Hussaini SR, Moloney MG. 2,5-Disubstituted pyrrolidines: synthesis by enamine reduction and subsequent regioselective and diastereoselective alkylations. Org Biomol Chem 2006; 4:2600-15. [PMID: 16791325 DOI: 10.1039/b604183c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Methodology for the diastereoselective synthesis of 2,5-disubstituted pyrrolidines by reduction of enamines derived from pyroglutamic acid is reported; the nature of nitrogen protection was found to be critical for the stereochemical control of the reaction outcome. Regioselective manipulation of the C-2 and C-5 substituents is possible, providing access to differently substituted pyrrolidines for a limited number of cases.
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44
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Mitchell JM, Shaw JT. A Structurally Diverse Library of Polycyclic Lactams Resulting from Systematic Placement of Proximal Functional Groups. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200503341] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Mitchell JM, Shaw JT. A Structurally Diverse Library of Polycyclic Lactams Resulting from Systematic Placement of Proximal Functional Groups. Angew Chem Int Ed Engl 2006; 45:1722-6. [PMID: 16482504 DOI: 10.1002/anie.200503341] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Judith M Mitchell
- Department of Chemical Biology, Broad Institute of Harvard and MIT, Cambridge, MA 02141, USA
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46
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Ohfune Y, Shinada T. Enantio‐ and Diastereoselective Construction of α,α‐Disubstituted α‐Amino Acids for the Synthesis of Biologically Active Compounds. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500434] [Citation(s) in RCA: 274] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yasufumi Ohfune
- Department of Materials Science, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi‐ku, Osaka 558‐8585, Japan
| | - Tetsuro Shinada
- Department of Materials Science, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi‐ku, Osaka 558‐8585, Japan
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47
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48
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Broadrup RL, Wang B, Malachowski WP. A general strategy for the synthesis of azapeptidomimetic lactams. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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49
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Loiseleur O, Koch G, Cercus J, Schürch F. A Formal Synthesis of (+)-Discodermolide. Org Process Res Dev 2005. [DOI: 10.1021/op049807s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Olivier Loiseleur
- Chemical and Analytical Development, Novartis Pharma AG, CH-4002 Basel, Switzerland
| | - Guido Koch
- Chemical and Analytical Development, Novartis Pharma AG, CH-4002 Basel, Switzerland
| | - Jacques Cercus
- Chemical and Analytical Development, Novartis Pharma AG, CH-4002 Basel, Switzerland
| | - Friedrich Schürch
- Chemical and Analytical Development, Novartis Pharma AG, CH-4002 Basel, Switzerland
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50
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Hale JJ, Yan L, Neway WE, Hajdu R, Bergstrom JD, Milligan JA, Shei GJ, Chrebet GL, Thornton RA, Card D, Rosenbach M, Mandala S. Synthesis, stereochemical determination and biochemical characterization of the enantiomeric phosphate esters of the novel immunosuppressive agent FTY720. Bioorg Med Chem 2005; 12:4803-7. [PMID: 15336258 DOI: 10.1016/j.bmc.2004.07.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2004] [Accepted: 07/07/2004] [Indexed: 11/23/2022]
Abstract
The novel immunosuppressive agent FTY720 (1) is phosphorylated in vivo in a variety of species yielding an active metabolite that is an agonist of four of the five known G-protein-coupled sphingosine-1-phosphate (S1P) receptors. A synthesis amenable to producing gram quantities of the stereoisomeric phosphate esters, a determination of their absolute stereochemistry via an enantioselective synthesis and their characterization as S1P receptor agonists and antagonists is reported.
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Affiliation(s)
- Jeffrey J Hale
- Department of Medicinal Chemistry, Merck Research Laboratories, Rahway, NJ 07065, USA.
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