SYNTHESIS OF ACYLATED ACTIVE METHYLENE COMPOUNDS WITH N-Boc-L-PHENYLALANINE AND THEIR HETEROCYCLIZATION, BOTH ACHIEVED ENANTIOSELECTIVELY
作者:Stylianos Hamilakis、Athanase Tsolomitis
DOI:10.1515/hc.2005.11.3-4.325
日期:2005.1
reported by Melilo et. al., who treated a carboxylic acid with 1,1 -carbonyldiimidazole (CDI), followed by treatment with Meldrum's acid in the presence of 4-//,//-dimethylaminopyridine (DMAP). Another process for the acylation of Meldrum's acid was developed by Jouin et. al. using chiral //-protected amino acids. These //-protected amino acids were activated with isopropenyl chloroformate (IPCF), which
已发现三种活性亚甲基化合物丙二腈、氰基乙酸甲酯和 Meldrum 酸可在羰基二咪唑 (CDI) 活化条件下用 n-Boc-L-苯丙氨酸有效酰化。以高产率 (63-97%) 分离出的两种氨基乙酰衍生物,对映选择性地,很容易杂环化为相应的特拉姆酸,5-苄基-4-羟基-1-叔丁氧基羰基吡喃>1-2(5H)-one,和 2-amino-3-cyano-2pyrTolin-4-one,也是对映选择性的。活性亚甲基化合物如 4a 和 4b 的氨基乙酰衍生物已被用作双官能化烯胺、烯醇醚和硫烯醇醚的合成子,据报道,它们可以修饰肽酰胺功能。另一方面,手性 2-取代特特拉姆酸作为 7 已用于合成新的抗 HIV 蛋白酶衍生物的研究过程中,以及用于他汀类药物类似物的合成子,一类具有广泛的生物活性化合物. 在之前的通讯中,我们报道了使用 Ν,Ν'-二环己基碳二亚胺 (DCC) 和混合酸酐活化条件的两种活性亚甲基化合物(氰基乙酸甲酯和