申请人:——
公开号:US20030181753A1
公开(公告)日:2003-09-25
The invention relates to a method for producing amides or esters from carboxylic acids and from an amine constituent or alcohol constituent in the presence of a 1,3,5-triazine and optionally in the presence of an organic solvent and of a tertiary amine. According to the invention, a (bi)cyclic diamine or an adduct formed therefrom with the triazine constituent is used as a tertiary amine in a preferred stoichiometric ratio of diamine to the triazine constituent ranging from 0.30 to 1.10; the stoichiometric ratio of carboxylic acid to the amine constituent or alcohol constituent should range from 0.2 to 5.0, and; the molar ratio of carboxylic acid to the triazine constituent ranges from 0.5 to 1.5. Amino acids such as N-protected amino acids and peptides serve as carboxylic acid constituents and (C-protected) amino acids or a C-protected peptide serve as the amine constituent. 2-chlorine-4,6-dimethoxy-1,3,5-triazine (CDMT) is used as the preferred 1,3,5-triazine, and the N,N′-dimethyl-1,4-piperazine is used as the cyclic diamine. In addition to this method, which can be carried out at temperatures ranging from −80 to +150 ° C. and in the presence of an organic solvent, the invention also relates to adducts comprised of (bi)cyclic diamine and 1,3,5-triazine. Compared to the prior art, higher yields with shorter reaction times are achieved using the described method, and distinctly smaller waste quantities of tertiary amine bases accrue.
本发明涉及一种制备酰胺或酯的方法,该方法使用羧酸和胺成分或醇成分在1,3,5-三嗪的存在下,并可选地在有机溶剂和三级胺的存在下进行。根据本发明,在首选的化学计量比范围内,使用(双)环二胺或与三嗪成分形成的加合物作为三级胺,该范围为0.30至1.10的二胺/三嗪成分比;羧酸成分与胺成分或醇成分的化学计量比应在0.2至5.0范围内,羧酸成分与三嗪成分的摩尔比应在0.5至1.5范围内。氨基酸(如N-保护氨基酸和肽)可用作羧酸成分,(C-保护)氨基酸或C-保护肽可用作胺成分。2-氯-4,6-二甲氧基-1,3,5-三嗪(CDMT)是首选的1,3,5-三嗪,N,N'-二甲基-1,4-哌嗪是环二胺。除了可以在−80至+150°C的温度范围内和有机溶剂的存在下进行的该方法外,本发明还涉及由(双)环二胺和1,3,5-三嗪组成的加合物。与现有技术相比,使用所述方法可获得更高的收率和更短的反应时间,并且生成的废弃三级胺碱基数量明显减少。