A Preparation of Alkyl or Alkenyl<i>N</i>,<i>N</i>-Dimethylchalcogenocarbamates and Their One-Step Conversion into Symmetrical Dialkyl or Dialkenyl Dichalcogenides
作者:Kazuaki Shimada、Seiji Oikawa、Hidenori Nakamura、Akiko Moro-oka、Miho Kikuchi、Akiko Maruyama、Takahiro Suzuki、Hisashi Kogawa、Yukiko Inoue、Yaling Gong、Shigenobu Aoyagi、Yuji Takikawa
DOI:10.1246/bcsj.78.899
日期:2005.5
Alkyl or alkenyl N,N-dimethylchalcogenocarbamates were easily prepared by a stepwise treatment of bis(N,N-dimethylcarbamoyl) dichalcogenides with NaH or NaBH4, followed by various alkylating agents or acetylenes bearing electron-withdrawing substituents. The one-step conversion of alkyl or alkenyl N,N-dimethylselenocarbamates or N,N-dimethyltellurocarbamates into the corresponding symmetrical dialkyl or dialkenyl dichalcogenides was also achieved efficiently by treating with SnCl4.
先用 NaH 或 NaBH4 分步处理双(N,N-二甲基氨基甲酰基)二羰基化合物,再用各种烷基化剂或带有抽电子取代基的乙炔基,就能轻松制备出烷基或烯基 N,N-二甲基羰基氨基甲酸盐。用 SnCl4 处理烷基或烯基 N,N-二甲基硒羰基氨基甲酸酯或 N,N-二甲基碲羰基氨基甲酸酯,也能一步高效地转化为相应的对称二烷基或二烯基二羰基化合物。