Copper-catalyzed N-methylation/ethylation of sulfoximines
作者:Fan Teng、Jiang Cheng、Jin-Tao Yu
DOI:10.1039/c5ob01558h
日期:——
A protocol for the copper-catalyzed N-methylation of sulfoximines with di-tert-butyl peroxide (DTBP) was developed. This protocol has good functional group tolerance leading to N-methylated sulfoximines in moderate to good yields. Besides, N-ethylation of sulfoximines was achieved in the presence of bis(1,1-dimethylpropyl)peroxide as the ethylating agent under a standard procedure.
Direct Access to N-Alkylsulfoximines from Sulfides by a Sequential Imidation/Oxidation Procedure
作者:Vincent Bizet、Carsten Bolm、Carl Dannenberg
DOI:10.1055/s-0034-1380536
日期:——
Synthetically relevant N-alkyl-substituted sulfoximines are directly prepared from sulfides by an unprecedented one-pot imidation/oxidation sequence. In situ generated N-bromoalkylamines serve as readily accessible imidating agents leading to N-alkylsulfiliminium bromides that are subsequently oxidized providing the corresponding N-alkylsulfoximines. In this manner, gram quantities of the products can be obtained in a short period of time avoiding the use of toxic and cumbersome to handle alkylating reagents.