Asymmetric syntheses of enantiopure C(5)-substituted transpentacins via diastereoselective Ireland–Claisen rearrangements
作者:Stephen G. Davies、Ai M. Fletcher、Paul M. Roberts、James E. Thomson、Charlotte M. Zammit
DOI:10.1039/c3cc43250e
日期:——
Asymmetric syntheses of (S,S,S)-2-amino-5-methylcyclopentanecarboxylic acid and (S,S,S)-2-amino-5-phenylcyclopentanecarboxylic acid were achieved in 9 steps from commercially available starting materials via the IrelandâClaisen rearrangement of two enantiopure β-amino allyl esters, followed by ring-closing metathesis, reduction and deprotection.
通过对两种对映纯的β-氨基烯丙基酯进行爱尔兰-克莱森重排,随后进行环闭合复分解、还原和去保护,从商业可得的起始材料出发,成功合成了(S,S,S)-2-氨基-5-甲基环戊烷羧酸和(S,S,S)-2-氨基-5-苯基环戊烷羧酸,共经过9个步骤。