Preparation of Some Bis(fluorodimethylsilyl)alkanes
作者:Makoto Kumada、Kiyomi Naka、Yoshihiro Yamamoto
DOI:10.1246/bcsj.37.871
日期:1964.6
demethylation of bis(trimethylsilyl)alkanes of the general formula Me3SiRSiMe3 by concentrated sulfuric acid, followed by fluorination with ammonium hydrogenfluoride, can successfully be used for the method generally applicable to the preparation of bis(fluorodimethylsilyl)- alkanes, FMe2SiRSiMe2F. Although Si-Me cleavage was the main reaction in most cases, some part of the reaction gave a cleavage between
已经确定,通式 Me3SiRSiMe3 的双(三甲基甲硅烷基)烷烃用浓硫酸脱甲基,然后用氟化氢铵氟化,可以成功地用于通常适用于制备双(氟二甲基甲硅烷基)烷烃的方法, FMe2SiRSiMe2F。尽管在大多数情况下 Si-Me 裂解是主要反应,但部分反应在硅和 R 基团之间产生裂解。发现 R 从硅裂解的难易度按以下顺序降低:CH2,CHMe> (CH2)2>(CH2)3>(CH2)4,(CH2)5,(CH2)6>CHCl>CMe2
Tetrabutylammonium Butyldifluorodimethylsilicate and Difluorodimethylphenylsilicate, New Nucleophilic Fluorinating Reagents
作者:Jaroslav Kvíčala、Petr Mysík、Oldřich Paleta
DOI:10.1055/s-2001-12315
日期:——
Tetrabutylammonium butyldifluorodimethylsilicate (TAMBS, 1 a) and tetrabutylammonium difluorodimethylphenylsilicate (TAMPS, 1 b) were conveniently prepared from the corresponding substituted fluorodimethylsilanes and tetrabutylammonium fluoride. Both fluorosilicates 1 a, 1 b are powerful nucleophilic fluorinating reagents which transform primary or secondary halides, tosylates, or mesylates to the corresponding fluorides in moderate to good yields.
四丁基丁基二氟二甲基硅酸铵(TAMBS,1 a)和四丁基二氟二甲基苯基硅酸铵(TAMPS,1 b)由相应的取代氟二甲基硅烷和四丁基氟化铵方便地制备而成。氟硅酸盐 1 a 和 1 b 都是强力的亲核氟化试剂,可将伯或仲卤化物、甲苯磺酸盐或甲磺酸盐转化为相应的氟化物,收率适中甚至很高。