17903-30-9Relevant academic research and scientific papers
Activation and Functionalization of C-C σ Bonds of Alkylidene Cyclopropanes at Main Group Centers
Crimmin, Mark R.,Kong, Richard Y.
supporting information, p. 11967 - 11971 (2020/08/06)
Aluminum(I) and magnesium(I) compounds are reported for the C-C σ-bond activation of strained alkylidene cyclopropanes. These reactions result in the formal addition of the C-C σ bond to the main group center either at a single site (Al) or across a metal-metal bond (Mg-Mg). Mechanistic studies suggest that rather than occurring by a concerted oxidative addition, these reactions involve stepwise processes in which substrate binding to the main group metal acts as a precursor to α- or β-alkyl migration steps that break the C-C σ bond. This mechanistic understanding is used to develop the magnesium-catalyzed hydrosilylation of the C-C σ bonds of alkylidene cyclopropanes.
Kinetic Resolution of Tertiary Propargylic Alcohols by Enantioselective Cu?H-Catalyzed Si?O Coupling
Seliger, Jan,Dong, Xichang,Oestreich, Martin
supporting information, p. 1970 - 1974 (2019/01/29)
A broad range of tertiary propargylic alcohols were kinetically resolved by catalyst-controlled enantioselective silylation. This non-enzymatic kinetic resolution is catalyzed by a Cu?H species and makes use of the commercially available precatalyst MesCu/(R,R)-Ph-BPE and a simple hydrosilane as the resolving reagent. Both alkyl,aryl- as well as dialkyl-substituted propargylic alcohols participate, and especially high selectivity factors are achieved when the alkyne terminus carries a TIPS group, which also enables facile post-functionalization in this position (s up to 207).
An Electron Spin Resonance Study of Silacyclopentyl and Related Radicals
Jackson, Richard A.,Zarkadis, Antonios K.
, p. 1139 - 1142 (2007/10/02)
Silacyclopentyl radicals, prepared by γ-irradiation of silacyclopentane in an adamantane matrix, exist at low temperatures in two equivalent twist conformations, which interconvert at higher temperatures.The temperature variation of the ESR spectrum gives
