Organosilicon chemistry. Part 21. Reactions of NN-bistrifluoromethylamino-oxyl and perfluoro(2,4-dimethyl-3-oxa-2,4-diazapentane) with vinylsilanes, and pyrolysis of the resulting adducts
作者:Terence R. Fernandes、Robert N. Haszeldine、Anthony E. Tipping
DOI:10.1039/dt9780001024
日期:——
α-(CF3)2N·O group on silicon to eliminate a fluorosilane and perfluoro-2-azapropene and form a carbonyl compound, e.g.(CF3)2N·O·CH2·CH(SiF3)·O·N(CF3)2→ SiF4+ CF3N:CF2+(CF3)2N·CH2·CHO; (ii) nucleophilic attack by an α-chlorine atom on silicon to eliminate a chlorosilane and form an amide, e.g.(CF3)2N·CH2·CCl(SiCl3)·O·N(CF3)2→ SiCl4+(CF3)2N·CH2·CO·N(CF3)2; and (iii) intramolecular elimination of bis(trifluoromethyl)amine
的氧基(CF 3)2 N·O与oxadiazapentane(CF 3)2 N·O·N(CF 3)2上的反应与乙烯基硅烷CH 2:CH·的SiX 3,CH 2:四氯化碳·的SiX 3, CHCl:CH·SiX 3以高收率得到相应的加合物。硅烷顺式-MeCH:CH·SiCl 3与二氮杂戊烷的反应得到1:1的加合物(50%)和烯丙基取代产物(CF 3)2 N·O·CH 2 ·CH:CH·SiCl 3(50 %)。热解中的加合物通常会重新排列,例如RCH 2 ·CH(SiX 3)·O·N(CF 3)2 → RCH 2 ·CH(O·SiX 3)·N(CF 3)2 [R =(CF 3)2 N·O或(CF 3)2 N],但在硅上含有两个或三个氟取代基和/或烷基中的氯的那些进行消除反应。可能发生三种不同的消除方式,包括:(i)硅上α-(CF 3)2 N·O基团中的氟对氟的亲核攻击,以消除氟硅烷和全氟-2-氮杂丙烯并形成羰基化合物,例如(CF