1,1-Ethylboration of Trimethyl(methoxypropargyl)- and Chloro(dimethyl)methoxypropargylsilane. A Novel 1,2,5-Oxasilaborolane
作者:Bernd Wrackmeyer、Elena V. Klimkina、Tomas Kupcik、Tomas Kupcik、Ruth Lohwasser
DOI:10.1515/znb-2011-0117
日期:2011.1.1
Triethylborane reacts with trimethyl(methoxypropargyl)-silane via 1,1-ethylboration to give quantitatively a 90 : 10 mixture of (E)- and (Z)-3-diethylboryl-2-trimethylsilyl-pent- 2-yl-methyl ethers. In contrast, the reaction of triethylborane with chloro(dimethyl)methoxypropargylsilane affords the novel 1,2,5-oxasilaborolane [2,2-dimethyl-5-ethyl-3-(1- ethylpropylidenyl)-1-oxa-2-sila-5-boracyclopentane]