Chemoselective Carbonyl Allylations with Alkoxyallylsiletanes
作者:Paul Spaltenstein、Elizabeth J. Cummins、Kelly-Marie Yokuda、Tim Kowalczyk、Timothy B. Clark、Gregory W. O’Neil
DOI:10.1021/acs.joc.8b03028
日期:2019.4.5
include salicylaldehydes and glyoxylic acids. Chemoselectivity in these reactions is thought to arise from a mechanism involving first exchange of the alkyoxy group on silicon with a substrate hydroxyl followed by activation of a nearby carbonyl by the Lewis acidic siletane and intramolecular allylation. In this way, substrates containing multiple reactive carbonyl groups (e.g., dialdehyde or triketone) can
Ring Expansion of Silacyclobutanes with Allenoates to Selectively Construct 2- or 3-(<i>E</i>)-Enoate-Substituted Silacyclohexenes
作者:Xiaoxiao Tang、Yan Zhang、Yulang Tang、Yi Li、Jiajing Zhou、Duyang Wang、Lu Gao、Zhishan Su、Zhenlei Song
DOI:10.1021/acscatal.1c05831
日期:2022.5.6
structural diversity of silacycles has been largely limited due to the lack of general synthetic methods. Here, we report an efficient synthesis of exo-cyclic enoate-substituted silacyclohexenes by the ringexpansion of silacyclobutanes with allenoates. The reaction proceeds with two regioselectivities during Si–C bond insertion. In the presence of the Pd/PR3 catalyst, unsubstituted allenoates undergo β, γ-insertion
Synthesis of silicon-carbon spiranes by metathesis on an aluminumrhenium catalyst
作者:N. V. Ushakov、E. B. Portnykh、N. A. Pritula、E. Sh. Finkel'shtein
DOI:10.1007/bf00962446
日期:1989.12
Ushakov, N. V.; Pritula, N. A., Journal of general chemistry of the USSR, 1992, vol. 62, # 6.2, p. 1087 - 1091
作者:Ushakov, N. V.、Pritula, N. A.
DOI:——
日期:——
Iodine-mediated rearrangements of diallylsilanes
作者:Gregory W. O'Neil、Elizabeth J. Cummins
DOI:10.1016/j.tetlet.2017.07.045
日期:2017.8
Diallylsilanes can be made to rearrange upon treatment with I2. Of the silanes tested, diallyldiphenylsilane showed the greatest propensity to undergo this intramolecular carbocation allylation process. After etherification of the initially formed iodosilane, the products from this transformation represent useful synthetic intermediates, suitable for alkylation and cross-metathesis/annulation reactions