Investigations on New Strategies for the Facile Synthesis of Polyfunctionalized Phosphinates: Phosphinopeptide Analogues of Glutathionylspermidine
作者:Shoujun Chen、James K. Coward
DOI:10.1021/jo971318l
日期:1998.2.1
Three possible methods for the facile synthesis of functionalized phosphinates, including the core of complex phosphinopeptide analogues of glutathionylspermidine, were explored. Among these methods, the three-component condensation reaction involving benzyl carbamate, an aldehyde, and a functionalized or nonfunctionalized phosphonite can afford a variety of protected alpha-aminophosphinates. However
探索了三种轻松合成功能化次膦酸酯的方法,包括谷胱甘肽亚精胺的复杂次膦肽类似物的核心。在这些方法中,涉及氨基甲酸苄酯,醛和官能化或非官能化亚膦酸酯的三组分缩合反应可得到多种保护的α-氨基次膦酸酯。然而,仅通过含多胺的亚膦酸酯与源自三苯胺的席夫碱的酸催化的Pudovik-Abramov-型反应可得到含多胺的α-(氨基亚甲基)次膦酸酯。因此,尽管具有水解稳定性,但Tfa保护的含多胺的亚膦酸酯可与三苯甲基甲亚胺平稳反应,并提供相应的次膦酸酯,合成谷胱甘肽亚精胺合成酶的膦肽肽抑制剂的关键中间体。通过选择性脱保护并偶联至受保护的二肽来精制该中间体,提供了谷胱甘肽亚精胺的含丙氨酸的次膦酸酯类似物。讨论了三种探索方法的局限性和范围。