to afford thioketones in good yields. The reaction mechanism involving N-thiosulfinylamine (R2C=N–N=S=S) and S-thioxothioketone (R2C=S=S) is proposed. The formation of t-butyl and di-1-adamantyl thioketones even at low temperatures has been interpreted as steric congestion alone being not enough to stabilize the corresponding S-thioxothioketones. The reaction of β-ketoenamines with disulfur dichloride
酮腙与
二氯化二硫在
三乙胺存在下反应,以良好的收率得到
硫酮。提出了涉及N-
硫代亚
磺胺(R2C=N-N=S=S)和S-
硫代
硫酮(R2C=S=S)的反应机理。即使在低温下,叔丁基和二-1-
金刚烷基
硫酮的形成也被解释为单独的空间拥挤不足以稳定相应的 S-
硫代
硫酮。β-酮烯胺与
二氯化二硫反应通过中间体 N-
硫代亚
磺胺的分子内环化得到 5H-1,2,3-二
噻唑。