Asymmetric synthesis of N-protected amino acids by the addition of organolithium carboxyl synthons to ROPHy/SOPHy-derived aldoximes and ketoximesChiral oxime ethers in asymmetric synthesis. Part 6.1
作者:Tracey S. Cooper、Pierre Laurent、Christopher J. Moody、Andrew K. Takle
DOI:10.1039/b310624a
日期:——
hydroxylamines, followed by N-protection, and oxidative cleavage of the carboxyl precursor gave a range of N-protected amino acids and esters. The method was exemplified by the synthesis of a range of derivatives of non-proteinogenic amino acids such as 4-bromophenylalanine, tert-leucine, norvaline, cyclohexyl- and aryl-glycines, 2-amino-8-oxodecanoic acid (Aoda) and alpha-methylvaline.
描述了一种新的α-氨基酸的不对称合成方法,其中关键步骤是将有机锂羧基合成子(2-呋喃基锂,苯基锂,乙烯基锂)高度非对映选择性地添加到(R)-和(S)-O-(1-苯基丁基) )肟产生羟胺,乙烯基锂是最令人满意的亲核试剂。随后还原羟胺中的NO键,然后进行N-保护,然后对羧基前体进行氧化裂解,得到一系列N-保护的氨基酸和酯。通过合成一系列非蛋白质氨基酸的衍生物(例如4-溴苯丙氨酸,叔亮氨酸,正缬氨酸,环己基和芳基甘氨酸,2-氨基-8-氧代十二烷酸(Aoda)和α)来举例说明该方法。 -甲基缬氨酸。