Evidence for C(1)–N(2) bond scission in the isomerization of cis-1,3-disubstituted N<sub>b</sub>-benzyl-1,2,3,4-tetrahydro-β-carbolines into their trans diastereomers under acidic conditions
作者:Eric D. Cox、Jin Li、Linda K. Hamaker、Peng Yu、J. M. Cook
DOI:10.1039/cc9960002477
日期:——
When cis diastereomer 13a was stirred in CF3CO2D the trans isomer 13b was isolated in 90% yield, while treatment of 13a with CF3CO2H-NaBH4 provided a mixture of the C(1)-N(2) cleaved product 14 and the trans isomer 130; this provides the best evidence to date that scission of the C(1)-N(2) bond occurs during epimerization of cis-1,3-disubstituted 1,2,3,4-tetrahydro-beta-carbolines such as 13a into their trans isomers 13b.