Reactions of Ketone Hydrazones and β-Keto Enamines with Disulfur Dichloride. New Synthesis of Thioketones and 5<i>H</i>-1,2,3-Dithiazoles
作者:Renji Okazaki、Kaoru Inoue、Naoki Inamoto
DOI:10.1246/bcsj.54.3541
日期:1981.11
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。