A convenient modification of the Gassman oxindole synthesis
作者:Stephen W. Wright、Lester D. McClure、David L. Hageman
DOI:10.1016/0040-4039(96)00920-3
日期:1996.7
A modification of the Gassman oxindole synthesis is described that proceeds from anilines and ethyl (methylsulfinyl)acetate, using oxalyl chloride to activate the sulfoxide to facilitate the formation of the key N - S bonded intermediate. This procedure is particularly convenient for reactions carried out on smaller scales and for anilines that are susceptible to electrophilic halogenation.
An aniline is converted to a 3-lower hydrocarbonthiooxindole by processes already known in the art, the product converted to a 3-halo-3-lower hydrocarbonthiooxindole by oxidative halogenation, and the product subjected to hydrolysis to form the desired isatins.
An aniline is converted to a 3-lower hydrocarbonthiooxindole by processes already known in the art, the product converted to a 3-halo-3-lower hydrocarbonthiooxindole by oxidative halogenation, and the product subjected to hydrolysis to form the desired isatins.