Synthesis and Properties of<i>o</i>-Thioquinone Methides Having Ketene Aminal, Ketene Acetal, Ketene Monothioacetal, or Ketene Dithioacetal Group
作者:Kyung-Tae Kang、Renji Okazaki、Naoki Inamoto
DOI:10.1246/bcsj.52.3640
日期:1979.12
of a considerable betaine nature. Reactions of 6a (N,N′-dimethyl derivative) with dimethyl acetylenedicarboxylate and dibenzoylacetylene led to [4+2] adducts. o-Thioquinone methides with a keteneacetal group were obtained from desulfurization of spiro[1,3-benzodioxole-2,3′-[1,2]benzodithiole] with trimethyl phosphite, which are equilibrated with two kinds of aggregates; one is a dimer and the other