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Martin T, Massif C, Wermester N, Linol J, Tisse S, Cardinael P, Coquerel G, Bouillon JP. Efficient preparation of enantiomerically pure α-aryl-α-trifluoromethylglycines via Auto Seeded Programmed Polythermic Preferential Crystallization of 5-aryl-5-trifluoromethylhydantoins. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2010.11.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cativiela C, Ordóñez M. Recent Progress on the Stereoselective Synthesis of Cyclic Quaternary alpha-Amino Acids. TETRAHEDRON, ASYMMETRY 2009; 20:1-63. [PMID: 20300486 PMCID: PMC2839256 DOI: 10.1016/j.tetasy.2009.01.002] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The most recent papers describing the stereoselective synthesis of cyclic quaternary alpha-amino acids are collected in this review. The diverse synthetic approaches are classified according to the size of the ring and taking into account the bond that is formed to complete the quaternary skeleton.
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Affiliation(s)
- Carlos Cativiela
- Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, 50009 Zaragoza (Spain)
| | - Mario Ordóñez
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, 62209 Cuernavaca, Morelos (México)
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Fustero S, Sánchez-Roselló M, Rodrigo V, Sanz-Cervera J, Piera J, Simón-Fuentes A, del Pozo C. Solution-, Solid-Phase, and Fluorous Synthesis of β,β-Difluorinated Cyclic Quaternary α-Amino Acid Derivatives: A Comparative Study. Chemistry 2008; 14:7019-29. [DOI: 10.1002/chem.200702009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cavelier F, Marchand D, Martinez J. α,α′-Disubstituted Amino Acids with Silylated Side Chains as Lipophilic Building Blocks for the Synthesis of Peptaibol Analogues. Chem Biodivers 2008; 5:1279-87. [DOI: 10.1002/cbdv.200890114] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Baysal A, Durap F, Gümgüm B, Yıldırım L, Ülkü D, Boğa A, Özkar S. Synthesis, Characterization, Crystal and Molecular Structure of 1,5-Dihydro-2H-cyclopenta[1,2-b:5,4-b′]dipyridin-2-imine. Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Baumann T, Vogt H, Bräse S. The Proline-Catalyzed Asymmetric Amination of Branched Aldehydes. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600654] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Synthesis and antimicrobial activity of some derivatives of (7-hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid hydrazide. Molecules 2006; 11:134-47. [PMID: 17962784 DOI: 10.3390/11010134] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Accepted: 03/03/2006] [Indexed: 11/16/2022] Open
Abstract
(7-Hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid hydrazide (2) was prepared from (7-hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid ethyl ester (1) and 100% hydrazine hydrate. Compound 2, is the key intermediate for the synthesis of several series of new compounds such as Schiff's bases 3a-l, formic acid N'-[2-(7-hydroxy-2-oxo-2H- chromen-4-yl)acetyl] hydrazide (4), acetic acid N'-[2-(7-hydroxy-2-oxo-2H-chromen-4- yl)-acetyl] hydrazide (5), (7-hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid N'-[2-(4- hydroxy-2-oxo-2H-chromen-3-yl)-2-oxoethyl] hydrazide (6), 4-phenyl-1-(7-hydroxy-2- oxo-2H-chromen- 4-acetyl) thiosemicarbazide (7), ethyl 3-{2-[2-(7-hydroxy-2-oxo-2H- chromen-4-yl)-acetyl]hydrazono}butanoate (8), (7-hydroxy-2-oxo-2H-chromen-4-yl)- acetic acid N'-[(4-trifluoromethylphenylimino)methyl] hydrazide (9) and (7-hydroxy-2- oxo-2H-chromen-4-yl)acetic acid N'-[(2,3,4-trifluorophenylimino)-methyl] hydrazide (10). Cyclo- condensation of compound 2 with pentane-2,4-dione gave 4-[2-(3,5- dimethyl-1H-pyrazol-1-yl)-2-oxoethyl]-7-hydroxy-2H-chromen-2-one (11), while with carbon disulfide it afforded 7-hydroxy-4-[(5-mercapto-1,3,4-oxadiazol-2-yl)methyl]-2H- chromen-2-one (12) and with potassium isothiocyanate it gave 7-hydroxy-4-[(5- mercapto-4H-1,2,4-triazol-3-yl)methyl]-2H-chromen-2-one (14). Compound 7 was cyclized to afford 2-(7-hydroxy-2-oxo-2H-chromen-4-yl)-N -(4-oxo-2-phenylimino- thiazolidin-3-yl) acetamide (15).
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Yamada T, Ichino T, Hanyu M, Ninomiya D, Yanagihara R, Miyazawa T, Murashima T. A novel intramolecular hydrogen bonding between a side-chain pyridine ring and an amide hydrogen of the peptide backbone in tripeptides containing the new amino acid, α,α-di(2-pyridyl)glycine. Org Biomol Chem 2004; 2:2335-9. [PMID: 15305215 DOI: 10.1039/b406545j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four tripeptides (Z-AA1-2Dpy-AA3-OMe; AA1, AA3 = Gly, Aib) containing a novel amino acid, alpha, alpha-di(2-pyridyl)glycine (2Dpy), were synthesized by the modified Ugi reaction. NMR analysis clearly indicated that the 2Dpy-containing tripeptides except the peptide in which AA1, AA3 = Aib, adopt a unique conformation with two intramolecular hydrogen bonds between 2Dpy-NH and a pyridine nitrogen and between AA3-NH and another pyridine nitrogen. This conformation has so far not been reported. On the other hand, the peptide Z-Aib-2Dpy-Aib-OMe probably adopts a beta-turn structure which is stabilized by two intramolecular hydrogen bonds between 2Dpy-NH and a pyridine nitrogen and between AA3-NH and the C=O of the Z group.
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Affiliation(s)
- Takashi Yamada
- Department of Chemistry, Faculty of Science and Engineering, Konan University, Kobe, Japan.
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Zhang X, Breslav M, Grimm J, Guan K, Huang A, Liu F, Maryanoff CA, Palmer D, Patel M, Qian Y, Shaw C, Sorgi K, Stefanick S, Xu D. A new procedure for preparation of carboxylic acid hydrazides. J Org Chem 2002; 67:9471-4. [PMID: 12492358 DOI: 10.1021/jo026288n] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The standard method for preparing carboxylic acid hydrazides is hydrazinolysis of esters in alcoholic solutions. However, when applied to alpha,beta-unsaturated esters, the main product typically is the pyrazolidinone resulting from an undesired Michael-type cyclization. Other alternative methodologies reported for direct preparation of hydrazides from acids are inefficient. We developed an efficient and general process, involving preforming activated esters and/or amides followed by reaction with hydrazine, for the preparation of hydrazides including those of alpha,beta-unsaturated acids. This process gives the desired hydrazides in excellent yield and purity under mild conditions.
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Affiliation(s)
- Xini Zhang
- Johnson & Johnson Pharmaceutical Research & Development, L.L.C., Drug Evaluation, 1000 Route 202, Raritan, New Jersey 08869, USA.
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Peggion C, Crisma M, Formaggio F, Toniolo C, Wright K, Wakselman M, Mazaleyrat JP. Synthesis, conformational analysis, and spectroscopic characterization of peptides based on Daf, the first rigid transition-metal receptor, cyclic C(alpha,alpha)-disubstituted glycine. Biopolymers 2002; 63:314-24. [PMID: 11877741 DOI: 10.1002/bip.10071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Three series of terminally protected model oligopeptides to the nonamer level, based on 9-amino-4,5-diazafluorene-9-carboxylic acid, the first rigid bipyridine-type C(alpha,alpha)-disubstituted glycine, and either Gly, L-Ala, or Aib residues were synthesized by solution methods and fully characterized. The molecular structures of two derivatives and one tripeptide were determined in the crystal state by x-ray diffraction. Moreover, the solution preferred conformations of these peptides were assessed by Fourier transform infrared absorption and (1)H-NMR techniques. A comparison with the known structural tendencies of the strictly related C(alpha,alpha)-disubstituted glycyl residues 1-aminocyclopentane-1-carboxylic acid and 9-aminofluorene-9-carboxylic acid is made, and the implications for the use of the 9-amino-4,5-diazafluorene-9-carboxylic acid residue in conformationally constrained analogs of bioactive peptides are briefly examined. A spectroscopic (uv absorption, fluorescence, CD) characterization of this novel heteroaromatic C(alpha,alpha)-disubstituted glycine is also reported. Finally, preliminary conformational data and membrane activity measurements are discussed for an analog of the lipopeptaibol antibiotic [L-Leu(11)-OMe] trichogin GA IV in which a 9-amino-4,5-diazafluorene-9-carboxylic acid residue was synthetically incorporated in position 1 (replacing the original Aib residue).
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Affiliation(s)
- Cristina Peggion
- Biopolymer Research Center, CNR, Department of Organic Chemistry, University of Padova, Via Marzolo 1, 35131 Padua, Italy
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Mazaleyrat JP, Wright K, Wakselman M, Formaggio F, Crisma M, Toniolo C. 9-Amino-4,5-diazafluorene-9-carboxylic Acid (Daf), a New Cα,α-Disubstituted Glycine Containing a Spatially Constrained Bipyridine-Like Ligand for Transition Metals − Synthesis and Evaluation of Peptide-Coupling Conditions at itsC- andN-Termini. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200105)2001:10<1821::aid-ejoc1821>3.0.co;2-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Asensio A, Bravo P, Crucianelli M, Farina A, Fustero S, Soler J, Meille S, Panzeri W, Viani F, Volonterio A, Zanda M. Synthesis of Nonracemic α-Trifluoromethyl α-Amino Acids from Sulfinimines of Trifluoropyruvate. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200104)2001:8<1449::aid-ejoc1449>3.0.co;2-2] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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