of carbonyl compounds has been developed. When carbonyl compounds were allowed to react with trimethylsilyl phenylselenide and tributylstannyl hydride in the presence of a catalytic amount of AIBN as the radical initiator, hydrosilylation of the carbonyl compounds efficiently proceeded to give the corresponding silyl ethers in moderate to good yields. In the absence of carbonyl compounds, the triethylsilyl
Chelates as intermediates in nucleophilic additions to alkoxy ketones according to Cram's rule (cyclic model)
作者:Xiangning Chen、Edwin R. Hortelano、Ernest L. Eliel、Stephen V. Frye
DOI:10.1021/ja00031a036
日期:1992.2
Chelates have been considered intermediates in the often highly stereoselective reactions of α-alkoxy and similarly substituted ketones for over 30 years, 10 but without mechanistic evidence
Generation and Reactions of ε-Carbonyl Cations via Group 13 Catalysis
作者:Page M. Penner、James R. Green
DOI:10.3390/molecules27103078
日期:——
The generation of ε-carbonyl cations and their reactions with nucleophiles is accomplished readily without transition metal cation stabilization, using the ε-bromide dienoate or dienone starting materials and GaCl3 or InCl3 catalysis. Arene nucleophiles are somewhat more straightforward than allyltrimethylsilane, but allyltrimethylsilane and propiophenone trimethysilyl enol ether each react successfully
[GRAPHICS]When carbonyl compounds were allowed to react with phenyl trimethylsilyl selenide and tributylstannyl hydride in the presence of a catalytic amount of AIBN as a radical initiator, the hydrosilylation of the carbonyl compounds efficiently proceeded to give the corresponding silyl ethers in moderate to good yields.
Competing kc, borderline, ks, and carbonyl addition processes in solvolyses of .alpha.-keto mesylates and triflates. .alpha.-Keto cations. 5