Tetrabutylammonium dichlorobromide: an efficient and mild reagent for geminal bromochlorination of α-diazo carbonyl compounds
摘要:
An efficient and mild one-pot procedure for geminal bromochlorination of alpha-diazo carbonyl compounds has been developed for the first time using tetrabutylammonium dichlorobromide (TBADCB) via metal carbenoids. This protocol was found to be highly selective and does not result in dichlorination or dibromination products. The reagent, TBADCB, is commercially available, easy to prepare and handle. (C) 2015 Elsevier Ltd. All rights reserved.
Solvent-free preparation of α,α-dichloroketones with sulfuryl chloride
作者:Dewei Tu、Juan Luo、Wengao Jiang、Qiang Tang
DOI:10.1016/j.tetlet.2021.153335
日期:2021.9
An efficient and facile method is reported for the synthesis of a series of α,α-dichloroketones. The direct dichlorination of methyl ketones and 1,3-dicarbonyls using an excess amount of sulfuryl chloride affords the corresponding -dichloro compounds in moderate to excellent yields. Moreover, the protocol features high yields, broad substrate scope, and simple reaction conditions without using any
An efficient and mild one-pot procedure for geminal bromochlorination of alpha-diazo carbonyl compounds has been developed for the first time using tetrabutylammonium dichlorobromide (TBADCB) via metal carbenoids. This protocol was found to be highly selective and does not result in dichlorination or dibromination products. The reagent, TBADCB, is commercially available, easy to prepare and handle. (C) 2015 Elsevier Ltd. All rights reserved.
Bankowska, Roczniki Chemii, 1959, vol. 33, p. 1039,1344