作者:Yi Wang、Andrew J. Bennet
DOI:10.1039/b704509c
日期:——
Two isomeric bicyclo[4.1.0]heptane analogues of the glycosidase inhibitor galacto-validamine, (1R*,2S,3S,4S,5S,6S*)-5-amino-1-(hydroxymethyl)bicyclo[4.1.0]heptane-2,3,4-triol, have been synthesized in 13 steps from 2,3,4,6-tetra-O-benzyl-D-galactose. The inhibitory activities of the two conformationally restricted amines, and their corresponding acetamides, were measured against commercial alpha-galactosidase
糖苷酶抑制剂半乳糖有效胺的两个异构双环[4.1.0]庚烷类似物,(1R *,2S,3S,4S,5S,6S *)-5-氨基-1-(羟甲基)双环[4.1.0]庚烷由2,3,4,6-四-O-苄基-D-半乳糖分13步合成了-2,3,4-三醇。测定了两种构象受限的胺及其相应的乙酰胺对来自咖啡豆和大肠杆菌的商业α-半乳糖苷酶的抑制活性。糖基水解酶家族GH27酶(咖啡豆)的活性被1R,6S-胺(7)竞争性抑制,其结合相互作用的特征在于K(i)值为0.541 microM。GH36大肠杆菌α-半乳糖苷酶表现出与1R,6S-胺的弱得多的结合相互作用(IC(50)= 80 microM)。非对映异构体1S,6R-胺(9)与两个半乳糖苷酶均弱结合,