Chemoenzymatic route to Tyrphostins involving lipase-catalyzed kinetic resolution of 1-phenylethanamine with alkyl cyanoacetates as novel acylating agents
作者:Pál Csuka、Zoltán Boros、László Őrfi、Judit Dobos、László Poppe、Gábor Hornyánszky
DOI:10.1016/j.tetasy.2015.04.013
日期:2015.7
Ethyl and isopropyl cyanoacetates were tested as acylating agents in the kinetic resolution of racemic 1-phenylethanamine rac-1 catalyzed by lipase B from Candida antarctica. The best conversion combined with high enantioselectivity was achieved with ethyl cyanoacetate 2a as the acylating agent and immobilized lipase B from Candida antarctica (CaLB N435) as the biocatalyst. Enantiomers of the amides
乙基和异丙基氰基乙酸酯进行了测试,如外消旋的1-苯基乙胺的动力学拆分酰化剂外消旋- 1催化通过从脂肪酶B南极假丝酵母。最佳的转换高对映选择性合并,用氰基乙酸乙酯实现图2a作为酰化剂和固定化脂肪酶从乙南极假丝酵母(钙LB N435)作为生物催化剂。酰胺类(对映体- [R )- 3及(小号- )3通过脂肪酶催化的动力学拆分和由残留的化学转化(具有高对映体纯度(ee值> 98%),得到小号) -1,分别。酰胺用各种芳族醛反应4A - Ç,ê在Knoevenagel缩合,得到酪氨酸磷酸化抑制剂外消旋-图5a - Ç,ê,(- [R )- 5A - Ç,È和(小号) -图5a - Ç,ê,被测试作为蛋白酪氨酸激酶上的人类癌症抑制剂细胞系HCT 116,A549,PC9,PC9ER,的Jurkat和MV4-11。虽然一些新颖酪氨酸磷酸化抑制剂的表现出弱的生物活性(EC 50 〜6-60μM),没有一个