Silylation and germylation of trialkylsilyl(germyl)ethoxyacetylenes containing bulky substituents at the silicon or germanium atom were performed. In all cases, the corresponding bis-organoelement-containing ketenes were obtained as the only reaction products. No intermediate isomeric ynol ethers were detected by spectroscopy.
Access to Substituted Indenol Ethers via a Regioselective Intermolecular Carbopalladation Cascade
作者:Brandon L. Coles-Taylor、Mitchell L. Ellinwood、Maximilian S. McCallum、Sara L. McCormack、Meredith H. Jones、Andrés G. Muñoz、Brian W. Michel
DOI:10.1021/acs.joc.2c02213
日期:2022.12.16
can rapidly generate multiple new C–C bonds; however, regioselectivity is challenging for intermolecular variants. Using ynol ethers, we observe complete regiocontrol of migratory insertion followed by a second migratory insertion with a pendant alkene to turn-over the catalytic cycle. The resulting products are oligosubstituted 1-indenol ethers with defined stereochemistry based on the initial alkene
作者:S. V. Ponomarev、A. S. Zolotareva、A. S. Leont"ev、Yu. V. Kuznetsov、V. S. Petrosyan
DOI:10.1023/a:1011393908126
日期:——
Silylation and germylation of trialkylsilyl(germyl)ethoxyacetylenes containing bulky substituents at the silicon or germanium atom were performed. In all cases, the corresponding bis-organoelement-containing ketenes were obtained as the only reaction products. No intermediate isomeric ynol ethers were detected by spectroscopy.