Dipolare zwischenstufen bei (S,N)-cope-umlagerungen von allyl-thioimidaten
作者:Rudolf Gompper、Bernhard Kohl
DOI:10.1016/s0040-4039(00)77735-5
日期:1980.1
(2-Benzoyl-ally)-thiocaprolactim rearranges at room temperature via a dipolar intermediate to N-(2-benzoyl-allyl)-thiocaprolactam or forms a 1.3-thiazinium salt.
A highly enantioselective one-pot synthesis of cyclopropane-fused tetrahydroquinolines bearing carbonyl functionalities, which are difficult to synthesize using conventional methods, is reported. Employing readily accessible alkene-tethered anthranilaldehydes, hydrazone formation and subsequent Ru-catalyzed intramolecular cyclopropanation furnish the desired products in ≤87% yield and ≤95% ee under