A Novel Synthesis of Thiocarboxylic<i>S</i>-Esters from 1-(Acylthio)ethaniminium Halides and Alkyl Halides Using Liquid-Liquid Phase-Transfer Catalysis
作者:Toshio Takido、Masaharu Toriyama、Kunio Itabashi
DOI:10.1055/s-1988-27595
日期:——
S-Alkyl, S-benzyl, and S-(2-alkenyl) thiocarboxylates are prepared in good yields by acylation of thioacetamide with aryl halides and reaction of the resultant 1-(acylthio)ethaniminium halides with alkyl halides under liquid-liquid phase-transfer conditions.
The first catalytic α-alkylation reaction of benzyl sulfides and 1,3-dithianes with styrenes and conjugated dienes was developed under mild conditions by using a readily available Brønsted base potassium bis(trimethylsilyl)amide (KHMDS) as catalyst. The reaction displayed good functional group tolerance, high efficiency, and excellent chemoselectivity. A series of desired alkylation products were obtained
Synthesis of S-alkyl alkanethioates via 1-iodoalk-1-enyldialkylboranes
作者:Masayuki Hoshi、Yuzuru Masuda、Akira Arase
DOI:10.1039/c39850000714
日期:——
S-Alkylalkanethioates were formed in high yields by successive reactions of 1-iodoalk-1-enylbis(1,2-dimethylpropyl)boranes with alkylthiomagnesium bromides and alkaline hydrogen peroxide.