Silylated cyclohexadienes in radical chain hydrosilylations
A new method for the mild radical hydrosilylation of alkenes and alkynes is described. Silylated cyclohexadienes that can be readily prepared on large scale are used as radical hydrosilylating reagents. Nonactivated alkenes and alkynes are hydrosilylated in high yields. The reaction can be combined with C-C bond formation, as demonstrated for the preparation of silylated cycloalkanes from the corresponding dienes. Furthermore, radical hydrosilylations in combination with β-fragmentation reactions for the synthesis of allylsilanes and hydrosilylations of aldehydes and ketones providing protected alcohols can be readily performed by this strategy.
Amrein, Stephan,Studer, Armido
p. 3559 - 3574
(2007/10/03)
A novel and efficient method for the silylation of alcohols with methallylsilanes catalyzed by Sc(OTf)3
Reaction of alcohols with methallylsilanes in the presence of a catalytic amount of Sc(OTf)3 provides efficiently the corresponding alkyl silyl ethers. By using microencapsulated (MC) Sc(OTf)3, which can be easily recovered and reused, yields of alkyl silyl ethers are improved and the work-up process after completion of the reaction is considerably simplified. (C) 2000 Elsevier Science Ltd.
Suzuki,Watahiki,Oriyama
p. 8903 - 8906
(2007/10/03)
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