The scope and limitation of the regio- and enantioselective hydrolysis of aliphatic epoxides using Bacillus subtilis epoxide hydrolase, and exploration toward chirally differentiated tris(hydroxymethyl)methanol
摘要:
The substrate specificity of an engineered Bacillus subtilis epoxide hydrolase, which so far had shown high activity and enantioselectivity with 1-benzyloxymethyl-1 -methyloxirane, has been studied by altering the methyl substituent into hydrogen, oxygen-containing functionalities, and unsaturated homologs. High enantioselectivity (E = 44) was observed with 1-benzyloxymethyl-1-vinyloxirane with a proper catalytic activity. The elaboration of the reaction conditions and work-up procedures enabled a preparative-scale kinetic resolution, to give (R)-2-benzyloxymethyl-3-butene-1,2-diol and its antipodal (R)-epoxide in high ees. (C) 2010 Elsevier Ltd. All rights reserved.
BACE-1已成为未来阿尔茨海默氏症治疗中最具特征的靶标之一。根据成功鉴定的HIV-1蛋白酶的掩蔽抑制剂,我们预见到含有叔醇的过渡态模拟结构也将作为BACE-1抑制剂值得评估。通过合成路线使用环氧醇衍生物作为关键中间体制备了十二种新型抑制剂。最佳合成的叔羟基抑制剂的BACE-1 IC 50值为0.38μM。