Silylium-Ion-Promoted Ring-Opening Hydrosilylation and Disilylation of Unactivated Cyclopropanes
作者:Avijit Roy、Vittorio Bonetti、Guoqiang Wang、Qian Wu、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1021/acs.orglett.0c00173
日期:2020.2.7
hydrosilylation of unactivated cyclopropanes is reported. The reaction is facilitated by the γ-silicon effect, and the regioselectivity is influenced by various stabilizing effects on the carbenium-ion intermediates, including the β-silicon effect. The experimental observations are in accord with the computed reaction mechanism. The work also showcases the ability of silylium ions to isomerize cyclopropyl to allyl
Mild Ring‐Opening 1,3‐Hydroborations of Non‐Activated Cyclopropanes
作者:Di Wang、Xiao‐Song Xue、Kendall N. Houk、Zhuangzhi Shi
DOI:10.1002/anie.201811036
日期:2018.12.17
The Brown hydroboration reaction, first reported in 1957, is the addition of B−H across an olefin in an anti‐Markovnikov fashion. Here, we solved a long‐standing problem on mild 1,3‐hydroborations of non‐activated cyclopropanes. A three‐component system including cyclopropanes, boron halides, and hydrosilanes has been developed for borylative ring‐opening of cyclopropanes following the anti‐Markovnikov
The cleavage of two carbon-carbon bonds in a Wolff-Kishner reduction
作者:Robert P. Lemieux、Peter Beak
DOI:10.1016/s0040-4039(00)99463-2
日期:1989.1
The reaction of dispiro[cyclopropane-1,1′-indan-3′,1″-cyclopropane]-2′-one (1) under Wolff-Kishner conditions gives spiro[cyclopropane-1,1′-indan] (2) in which the ketone has been reduced and two bonds of one cyclopropane ring have been cleaved.
Contact chemical shifts for the carbon atoms of nickel complexes of the 4-alkylanilines. The factors governing the EPR hyperfine constants of carbon atoms
作者:Leon M. Stock、Michael R. Wasielewski
DOI:10.1021/ja00443a012
日期:1977.1
Partial rate factors for the nitration of cyclopropylbenzene derivatives. Influence of geometry on the stability of 3- and 4-cyclopropylbenzenonium ions