Silyl Phosphites. XVIII. Versatile Utility of α-(Trimethylsilyloxy)alkylphosphonates as Key Intermediates for Transformation of Aldehydes into Several Carbonyl Derivatives
作者:Mitsuo Sekine、Masashi Nakajima、Akiko Kume、Akio Hashizume、Tsujiaki Hata
DOI:10.1246/bcsj.55.224
日期:1982.1
trimethylsilyl phosphite (DTMSP) with aldehydes were converted, by treatment with lithium diisopropylamide (LDA) followed by the successive alkylation and alkalinehydrolysis, to carbonyl derivatives involving aldehydes, unsymmetrical ketones, β,γ-unsaturated ketones, and carboxylic acids. β-Substituted carboxylic esters and γ-substituted lactones were prepared by use of the carbonyl addition compounds of DTMSP
Mn-mediated reductive C(sp3)–Si coupling of activated secondary alkyl bromides with chlorosilanes
作者:Liangliang Qi、Xiaobo Pang、Kai Yin、Qiu-Quan Pan、Xiao-Xue Wei、Xing-Zhong Shu
DOI:10.1016/j.cclet.2022.03.070
日期:2022.12
solution to address this problem, but it typically relies on organometallic species. Herein, we report an Mn-mediated reductive C(sp3)–Si coupling to synthesize these compounds from alkyl and silyl electrophiles. This approach avoids the requirement for activation of Si–Cl by transition metals and thus allows for the coupling of various common chlorosilanes. The reaction proceeds under mild conditions
Deoxygenation of (1-hydroxyethyl)diphenylphosphine oxide derivatives was first achieved by a reaction with diphosphorus tetraiodide to give ethyldiphenylphosphine oxide derivatives. The reaction was also successful to prepare cyclohexyldiphenylphosphine oxide.