作者:D.B. Uliss、G.R. Handrick、H.C. Dalzell、R.K. Razdan
DOI:10.1016/0040-4020(78)80092-1
日期:1978.1
An investigation of the conversion of Δ1-3,4-cis-THC 1a to Δ6-3,4-trans-THC 2a with BBr3 is described. By use of 1a of known optical purity it was determined that the main epimerization occurs at C-4. The small loss of optical purity observed during formation of 2a results from either competitive epimerization at C-3 or a racemization process. The conversion of 3,4-cis- to 3,4-trans-HHCs proceeds with
Δ的转化的调查1 -3,4-顺-THC 1A至Δ 6 -3,4-反式-THC 2A与的BBr 3进行说明。通过使用已知的光学纯度的1a,确定主要差向异构化发生在C-4。在2a的形成过程中观察到的光学纯度的小损失是由于C-3上的竞争性差向异构化或外消旋过程造成的。的3,4-转化顺式-对3,4-反式-HHCs独家C-4反相进行。