Stereochemical Elucidation of the Reaction Products of .ALPHA.-Narcotine with Ethyl Chloroformate.
作者:Dong-Ung LEE、Ernst EIBLER、Klaus K. MAYER、Wolfgang WIEGREBE
DOI:10.1248/cpb.43.1995
日期:——
α-Narcotine (1) was treated with ethyl chloroformate by refluxing in dichloromethane to afford six products, which were separated by preparative high-performance liquid chromatography (HPLC). Their stereochemistry and structures were elucidated. This reaction proceeded initially to the chloro-carbamates and successively to the corresponding carbinols. In addition, N-desmethyl-N-carbethoxynarcotine (3), found in the HPLC chromatogram, was identified by direct comparison with synthetic 3; this compound had caused difficulty in our previous mass spectrometric investigations.