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]
三乙基硼烷通过 1,1-乙基硼化作用与三甲基(甲氧基炔丙基)-硅烷反应,定量得到 (E)- 和 (Z)-3-二乙基硼基-2-三甲基甲硅烷基-戊-2-基-甲基醚的 90:10 混合物。相比之下,三乙基硼烷与氯(二甲基)甲氧基炔丙基硅烷的反应提供了新型 1,2,5-oxasilaborolane [2,2-二甲基-5-乙基-3-(1-乙基亚丙基)-1-oxa-2-sila- 5-boracyclopentane] 通过 1,1- 乙基硼化、重排和醚裂解 图形摘要 三甲基(甲氧基炔丙基)- 和氯(二甲基)甲氧基炔丙基硅烷的 1,1-乙基硼化。一种新型 1,2,5-Oxasilaborolane