Direct S-difluoromethylation of thiols using the Ruppert–Prakash reagent
摘要:
Direct S-difluoromethylation of aryl and aliphatic thiols using the Ruppert-Prakash reagent is demonstrated. The reaction produces trimethylsilyldifluoromethyl sulfides, which upon cleavage with fluoride produces the difluoromethyl sulfides. The key reaction features are the use of relatively inexpensive and commercially available starting materials, shorter reaction times, ambient temperatures, easy reaction procedure, and selective S-difluoromethylation in the presence of-OH, -NH2 and -CO2H functional groups. Furthermore, one-pot arylthiodifluoromethyl transfer to PhCHO is also demonstrated. (C) 2015 Elsevier B.V. All rights reserved.
Direct S-difluoromethylation of thiols using the Ruppert–Prakash reagent
摘要:
Direct S-difluoromethylation of aryl and aliphatic thiols using the Ruppert-Prakash reagent is demonstrated. The reaction produces trimethylsilyldifluoromethyl sulfides, which upon cleavage with fluoride produces the difluoromethyl sulfides. The key reaction features are the use of relatively inexpensive and commercially available starting materials, shorter reaction times, ambient temperatures, easy reaction procedure, and selective S-difluoromethylation in the presence of-OH, -NH2 and -CO2H functional groups. Furthermore, one-pot arylthiodifluoromethyl transfer to PhCHO is also demonstrated. (C) 2015 Elsevier B.V. All rights reserved.
An Efficient Preparation of New Sulfonyl Fluorides and Lithium Sulfonates
作者:Fabien Toulgoat、Bernard. R. Langlois、Maurice Médebielle、Jean-Yves Sanchez
DOI:10.1021/jo701318n
日期:2007.11.1
polyfluoroalkanesulfonyl fluorides is reported. This method, based on the synthesis of polyfluoroalkyl trimethyl silanes (precursors of polyfluoroalkylsulfinates) as intermediates, allows the successive transformations to be carried out in one pot. Moreover, these sulfonyl fluorides can be obtained from the corresponding sulfinates by electrophilic fluorination. This original approach avoids isolation and purification
报道了几种多氟链烷磺酰氟的有效制备方法。该方法基于多氟烷基三甲基硅烷(多氟烷基亚磺酸盐的前体)作为中间体的合成,可以在一个罐中进行连续的转化。而且,这些磺酰氟可以通过亲电氟化从相应的亚磺酸盐获得。这种原始方法避免了某些热或水解不稳定中间体的分离和纯化。因此,已经从卤代二氟甲基化的前体RCF 2 X(X = F,Br; R = ArC(O),ArS(O)n(CF 2)m ; n = 0,1,2; m制备了一系列新的磺酰氟。 = 1、2),并已转化为相应的磺酸锂,它们有潜力用作锂电池的电解质。