Synthesis of chiral diamines using novel 2-trichloromethyloxazolidin-4-one precursors derived from 5-oxo-proline and proline
摘要:
Efficient syntheses of chiral vicinal diamines derived from (S)-oxo-proline and (S)-proline are described. The novel diastereomerically pure precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo-[3.3.0]-octan-4,8-dione 3 and its enantiomer are readily available by reaction of the inexpensive enantiomers of 5-oxo-proline with chloral. Compound 3 reacts with primary and secondary amines to afford the 5-oxo-prolylamides 4 in quantitative yield. In contrast, the (S)-proline-derived precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo[3.3.0]octan-4-one 6 gave (S)-N-formylprolylamides 9 and/or (S)-prolylamides 8 depending on the reaction conditions. Upon reduction with LiAlH4, amides 4 and 9 afforded the proline-derived (S)-2-(alkylaminomethyl)pyrrolidines 1 and (S)-N- methyl-2-(alkylaminomethyl)-pyrrolidines 5 in 70-90% yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of chiral diamines using novel 2-trichloromethyloxazolidin-4-one precursors derived from 5-oxo-proline and proline
摘要:
Efficient syntheses of chiral vicinal diamines derived from (S)-oxo-proline and (S)-proline are described. The novel diastereomerically pure precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo-[3.3.0]-octan-4,8-dione 3 and its enantiomer are readily available by reaction of the inexpensive enantiomers of 5-oxo-proline with chloral. Compound 3 reacts with primary and secondary amines to afford the 5-oxo-prolylamides 4 in quantitative yield. In contrast, the (S)-proline-derived precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo[3.3.0]octan-4-one 6 gave (S)-N-formylprolylamides 9 and/or (S)-prolylamides 8 depending on the reaction conditions. Upon reduction with LiAlH4, amides 4 and 9 afforded the proline-derived (S)-2-(alkylaminomethyl)pyrrolidines 1 and (S)-N- methyl-2-(alkylaminomethyl)-pyrrolidines 5 in 70-90% yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
The present invention relates to method of treatment, in particular to a method for the treatment of diabetes mellitus, especially non-insulin dependent diabetes mellitus (NIDDM) or Type 2 diabetes and conditions associated with diabetes mellitus the predi,betic state and/or obesity and to compositions for use in s ch method.
Notes - Some N-Substituted-5-oxo-2-pyrrolidinecarboxamides
作者:R. B. Angier、V. K. Smith
DOI:10.1021/jo01118a623
日期:1956.12.1
COMBINATION THERAPY FOR GLYCAEMIC CONTROL
申请人:Prosidion Limited
公开号:EP1663200A2
公开(公告)日:2006-06-07
US5102882A
申请人:——
公开号:US5102882A
公开(公告)日:1992-04-07
[EN] COMBINATION THERAPY FOR GLYCAEMIC CONTROL<br/>[FR] THERAPIE COMBINEE DE REGULATION GLYCEMIQUE
申请人:PROSIDION LTD
公开号:WO2005020983A2
公开(公告)日:2005-03-10
The present invention relates to method of treatment, in particular to a method for the treatment of diabetes mellitus, especiall non-insulin dependent diabetes mellitus (NIDDM) or Type 2 diabetes and conditions associat d with diabetes mellitus the predi,tbetic state and/or obesity and to compositions for use in s ch method.