1
|
Synthesis of cis- and trans-(±)-3-mercaptoproline and pipecolic acid derivatives via thio-Michael addition. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
2
|
Zhou DJ, Li XY, Li D, Guo ZS, Zhang QL, Bie HY, Cui ZG. Synthesis of dehydroindolizidine-type poison-frog alkaloids via Michael-type conjugate addition. JOURNAL OF CHEMICAL RESEARCH 2017. [DOI: 10.3184/174751917x14967701766987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A concise stereoselective synthesis of proposed dehydroindolizidine-alkaloids of types 179 and 207E1 was accomplished via Michael-type conjugate addition. A comparison of natural 207E and synthesised compound 207E on GC–FTIR revealed the double bond of natural 207E is most likely at the 7,8-position.
Collapse
Affiliation(s)
- De-Jun Zhou
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Xue-Yan Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Dong Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zhong-Shuai Guo
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Qin-Ling Zhang
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Hong-yan Bie
- School of Chemistry & Chemical Engineering, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zheng-Guo Cui
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
- Graduate School of Medicine and Pharmaceutical Science, University of Toyama, 2630 Sugitani, Toyama 930-0194 Japan
| |
Collapse
|
3
|
Ricci L, Sernissi L, Scarpi D, Bianchini F, Contini A, Occhiato EG. Synthesis and conformational analysis of peptides embodying 2,3-methanopipecolic acids. Org Biomol Chem 2017; 15:6826-6836. [DOI: 10.1039/c7ob01617d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
When 2,3-methanopipecolic acids replace a proline in peptides, a marked preference (42–92%) for thecisgeometry around the pipecolic amide bond is observed in both water and organic solvents.
Collapse
Affiliation(s)
- Luciano Ricci
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Lorenzo Sernissi
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Dina Scarpi
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Francesca Bianchini
- Department of Biomedical
- Experimental and Clinical Sciences “Mario Serio”
- University of Florence
- Florence
- Italy
| | - Alessandro Contini
- Department of Pharmaceutical Sciences
- University of Milan
- I-20133 Milan
- Italy
| | - Ernesto G. Occhiato
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| |
Collapse
|
4
|
Sernissi L, Petrović M, Scarpi D, Guarna A, Trabocchi A, Bianchini F, Occhiato EG. Cyclopropane Pipecolic Acids as Templates for Linear and Cyclic Peptidomimetics: Application in the Synthesis of an Arg-Gly-Asp (RGD)-Containing Peptide as an αvβ3Integrin Ligand. Chemistry 2014; 20:11187-203. [DOI: 10.1002/chem.201403077] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Indexed: 12/26/2022]
|
5
|
Felluga F, Forzato C, Nitti P, Pitacco G, Ghelfi F, Valentin E. First chemoenzymatic synthesis of (+)-2-carboxypyrrolidine-3-acetic acid, the nucleus of kainoid amino acids. Chirality 2011; 24:112-8. [PMID: 22180179 DOI: 10.1002/chir.21032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 09/08/2011] [Indexed: 11/12/2022]
Abstract
The distinctive nucleus of kainoid amino acids, (2S,3R)-(+)-2-carboxypyrrolidine-3-acetic acid 6, was synthesized by a chemoenzymatic process, exploiting the diastereomeric cis/trans methyl pyroglutamate derivatives 10a-c/11a-c as key intermediates. These mixtures, when subjected to a kinetic resolution mediated by α-chymotrypsin, reacted diastereo-, regio-, and enantioselectively to give the trans derivatives (+)-10a-c possessing the correct (2S,3R) configuration. Subsequently, the desired product (2S,3R)-(+)-6 could be obtained after well-established transformations.
Collapse
Affiliation(s)
- Fulvia Felluga
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy.
| | | | | | | | | | | |
Collapse
|
6
|
Occhiato EG, Casini A, Guarna A, Scarpi D. Diastereodivergent Synthesis of 4-Hydroxy-2,3-methanopipecolic Acid Derivatives as Conformationally Constrained Homoserine Analogues. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100962] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
7
|
Reuter C, Huy P, Neudörfl JM, Kühne R, Schmalz HG. Exercises in Pyrrolidine Chemistry: Gram Scale Synthesis of a Pro-Pro Dipeptide Mimetic with a Polyproline Type II Helix Conformation. Chemistry 2011; 17:12037-44. [DOI: 10.1002/chem.201101704] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Indexed: 01/29/2023]
|
8
|
Felpin FX, Nassar-Hardy L, Le Callonnec F, Fouquet E. Recent advances in the Heck–Matsuda reaction in heterocyclic chemistry. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.051] [Citation(s) in RCA: 211] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Huy P, Neudörfl JM, Schmalz HG. A practical synthesis of trans-3-substituted proline derivatives through 1,4-addition. Org Lett 2010; 13:216-9. [PMID: 21158419 DOI: 10.1021/ol102613z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical four-step synthesis of 3-alkyl-, vinyl-, and aryl-substituted proline derivatives, which are important building blocks for conformationally restrained peptide analogs, was developed. The method relies on a Cu-catalyzed 1,4-addition of Grignard reagents to N-protected 2,3-dehydroproline esters, efficiently prepared in a new one-pot protocol. The 1,4-addition products are obtained with good trans-selectivity (dr 5:1 to 25:1). A nonracemic sample of N-Cbz-3-vinylproline (74% ee) was obtained using Evans oxazolidinone as a chiral auxiliary.
Collapse
Affiliation(s)
- Peter Huy
- Department of Chemistry, University of Cologne, Greinstr. 4, 50939 Köln, Germany
| | | | | |
Collapse
|
10
|
Tian X, Field T, Mazur AW, Ebetino FH, Wos JA, Crossdoersen D, Pinney BB, Sheldon RJ. Design, synthesis, and evaluation of proline based melanocortin receptor ligands. Bioorg Med Chem Lett 2005; 15:2819-23. [PMID: 15911261 DOI: 10.1016/j.bmcl.2005.03.120] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Revised: 03/21/2005] [Accepted: 03/25/2005] [Indexed: 11/30/2022]
Abstract
A series of proline based melanocortin ligands has been developed on the basis of initial piperazine leads by using a more conformationally rigid scaffold. A number of these novel ligands showed significant binding affinity for MC3 and MC4 receptors.
Collapse
Affiliation(s)
- Xinrong Tian
- Procter & Gamble Pharmaceuticals, Health Care Research Center, Mason, OH 45040, USA.
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Herdeis C, Kelm B. A stereoselective synthesis of 3-substituted (S)-pyroglutamic and glutamic acids via OBO ester derivatives. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(02)01490-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Toyooka N, Fukutome A, Nemoto H, Daly JW, Spande TF, Garraffo HM, Kaneko T. Synthesis of alkaloid 223A and a structural revision. Org Lett 2002; 4:1715-7. [PMID: 12000281 DOI: 10.1021/ol025775m] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text] Synthesis of alkaloid 223A has been achieved by sequential use of our original conjugate addition reaction to enaminoesters as the key step. The proposed structure for natural 223A (A, absolute configuration unknown) was revised to B, and the relative stereostructure was determined to be 5R*,6R*,8R*,9S* by the present synthesis.
Collapse
Affiliation(s)
- Naoki Toyooka
- Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Sugitani 2630, 930-0194, Japan.
| | | | | | | | | | | | | |
Collapse
|
13
|
Buñuel E, Gil AM, Dı́az-de-Villegas MD, Cativiela C. Synthesis of constrained prolines by Diels–Alder reaction using a chiral unsaturated oxazolone derived from (R)-glyceraldehyde as starting material. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00533-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
|
15
|
Rubio A, Ezquerra J, Escribano A, Remuiñán MJ, Vaquero JJ. New enantioselective approach to the total synthesis of (−)-α-Kainic Acid. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00166-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
16
|
|