Radical Isomerization and Cycloisomerization Initiated by H• Transfer
作者:Gang Li、Jonathan L. Kuo、Arthur Han、Janine M. Abuyuan、Lily C. Young、Jack R. Norton、Joshua H. Palmer
DOI:10.1021/jacs.6b03509
日期:2016.6.22
concentration of an H• donor. Transfer of the H• onto an olefin gives a radical that can either (1) transfer an H• back to the metal, generating an isomerized olefin, or (2) add intramolecularly to a double bond, generating a cyclized radical. Transfer of an H• back to the metal from the cyclized radical results in a cycloisomerization. Both outcomes are favored by the low concentration of the cobalt H• donor,
Photochemical reactivity of α-phenyl β,γ-enones. Singlet 1,3-acyl shift, triplet aromatic di-π-methane (DPM) rearrangement and triplet aryl-carbonyl bridging
作者:Margareth J. C. M. Koppes、Peter C. J. Beentjes、Hans Cerfontain
DOI:10.1002/recl.19881070404
日期:——
The photochemistry of the series of α-phenyl β,γ-enones 6–10 has been studied under conditions of both direct (λ 300 nm) and triplet-sensitized irradiation with the aim of determining the reactivity patterns of these “multi”-chromophoric systems.
The direct chemoselective carbonylative cross-coupling reaction of allylic alcohols and organoalanes with 1 atm CO via nickel catalysis has been developed to access the β,γ-unsaturated ketones with broad scope. The use of organoalanes as both the coupling components and the activators for the alcohol functionalization was found to be both crucial and advantageous as the method does not require any
已经开发了通过镍催化烯丙醇和有机烷烃与 1 atm CO 的直接化学选择性羰基化交叉偶联反应来获得具有广泛范围的 β,γ-不饱和酮。由于该方法不需要任何外部活化剂,因此发现使用有机丙烷作为偶联组分和醇官能化的活化剂既是关键又是有利的。
Preparation et reactivite du derive lithie issu du dioxolanne du -ceto pentanoate de trimethylsilyle.
作者:Jean Louis Moreau、René Couffignal
DOI:10.1016/s0040-4039(00)85816-5
日期:1982.1
MOREAU, J. L.;COUFFIGNAL, R., TETRAHEDRON LETT., 1982, 23, N 50, 5271-5274