Iterative, Aqueous Synthesis of β3-Oligopeptides without Coupling Reagents
摘要:
The chemoselective synthesis of amides by decarboxylative couplings of alpha-ketoacids and isoxazolidines makes possible an iterative approach to poly-beta3-peptides. Peptide assembly occurs under aqueous conditions and requires no coupling reagents. The requisite isoxazolidine monomers are prepared in enantiopure form by a convenient two-step protocol starting from the appropriate aldehydes.
An amide is formed by reacting an α-ketoacid or salt thereof in a decarboxylative condensation reaction with an amine or salt thereof comprising a nitrogen covalently bound to an atom selected from oxygen, nitrogen, and sulfur. The amide bond is formed between the α-carbon of the ketoacid and the nitrogen of the amine. The α-ketoacid can be formed using a novel sulfur reagent.
US7737293B2
申请人:——
公开号:US7737293B2
公开(公告)日:2010-06-15
US7667076B2
申请人:——
公开号:US7667076B2
公开(公告)日:2010-02-23
[EN] AMIDE FORMING CHEMICAL LIGATION<br/>[FR] LIGATURE CHIMIQUE FORMANT UN AMIDE
申请人:UNIV CALIFORNIA
公开号:WO2007037812A1
公开(公告)日:2007-04-05
[EN] An amide is formed by reacting an a-ketoacid or salt thereof in a decarboxylative condensation reaction with an amine or salt thereof comprising a nitrogen covalently bound to an atom selected from oxygen, nitrogen, and sulfur. The amide bond is formed between the a-carbon of the ketoacid and the nitrogen of the amine. The a-ketoacid can be formed using a novel sulfur reagent. [FR] L'invention concerne la formation d'un amide par réaction d'un a-cétoacide ou d'un sel d'un a-cétoacide par une réaction de condensation décarboxylative avec une amine ou un sel d'une amine comprenant un azote lié par une liaison covalente à un atome choisi parmi l'oxygène, l'azote et le soufre. La liaison amide est formée entre l'a-carbone du cétoacide et l'azote de l'amine. L'a-cétoacide peut être formé en utilisant un nouveau réactif à base de soufre.
Amide forming chemical ligation
申请人:Bode W. Jeffrey
公开号:US20070060773A1
公开(公告)日:2007-03-15
An amide is formed by reacting an α-ketoacid or salt thereof in a decarboxylative condensation reaction with an amine or salt thereof comprising a nitrogen covalently bound to an atom selected from oxygen, nitrogen, and sulfur. The amide bond is formed between the α-carbon of the ketoacid and the nitrogen of the amine. The α-ketoacid can be formed using a novel sulfur reagent.