SYNTHESES OF<i>S</i>-PHENYL 3-OXOBUTANETHIOATES AND 2<i>H</i>-1-BENZOTHIOPYRAN-2-ONE DERIVATIVES (THIOCOUMARINS)
作者:Hiroyuki Nakazumi、Teijiro Kitao
DOI:10.1246/cl.1978.929
日期:1978.9.5
S-Phenyl 3-oxobutanethioates,precursor for preparation of thiocoumarins, were prepared from benzenethiols and diketene in the presence of triethylamine. Cyclization of these compounds with PPA gave thiocoumarin and/or isomeric thiochromone derivatives.