Synthesis and characterization of chiral 1,2-diamines from 5-oxo-pyrrolidine-(S)-2-carboxylic acid
摘要:
Unsymmetrical chiral secondary vicinal diamines were synthesized by applying a modified three-step reaction. The key step in this sequence is a primary amine mediated ring opening reaction of a diastereomeric oxazolidinone derivative. A possible mechanism for this step is described. (c) 2007 Elsevier Ltd. All rights reserved.
Five- and Six-Membered Ring Opening of Pyroglutamic Diketopiperazine
作者:Dennis A. Parrish、Lon J. Mathias
DOI:10.1021/jo0160928
日期:2002.3.1
A variety of ring-opening reactions of pyroglutamic diketopiperazine at both the five-membered and six-memberedrings is described. Mild, basic conditions facilitate nucleophilic attack by amines at the diketopiperazine carbonyls giving pyroglutamides in excellent yield. Reaction with nucleophiles under acidic conditions give bis-glutamate derivatives of 2,5-diketopiperazine (DKP). These reactions
Synthesis of chiral diamines using novel 2-trichloromethyloxazolidin-4-one precursors derived from 5-oxo-proline and proline
作者:Mohamed Amedjkouh、Per Ahlberg
DOI:10.1016/s0957-4166(02)00579-7
日期:2002.10
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.
On the discovery of new potent human farnesyltransferase inhibitors: emerging pyroglutamic derivatives
context of lack of emergence of innovative human farnesyltransferaseinhibitors families, and given all new therapeutic perspectives that open up for such molecules in rare diseases (e.g. Hutchinson–Gilford progeria syndrome), and in delta hepatitis, cardiovascular or neuroinflammatory diseases, we have just discovered a new series of powerful inhibitors. These molecules are pyroglutamic acid derivatives
Synthesis and characterization of chiral 1,2-diamines from 5-oxo-pyrrolidine-(S)-2-carboxylic acid
作者:Uwe Köhn、Andrea Schramm、Florian Kloß、Helmar Görls、Evelyn Arnold、Ernst Anders
DOI:10.1016/j.tetasy.2007.07.012
日期:2007.7
Unsymmetrical chiral secondary vicinal diamines were synthesized by applying a modified three-step reaction. The key step in this sequence is a primary amine mediated ring opening reaction of a diastereomeric oxazolidinone derivative. A possible mechanism for this step is described. (c) 2007 Elsevier Ltd. All rights reserved.