作者:M. Naruse、K. Utimoto、H. Nozaki
DOI:10.1016/s0040-4020(01)97353-3
日期:1974.1
Treatment of lithium trialkylalkynylborates (1) with methanesulphinyl chloride gives internal acetylenes (2) in good yields. The reaction proceeds via β-methanesulphinylvinylboranes 3, followed by cis elimination of methanesulphinyl group and dialkylboron groups. The reaction mixture of B-alkyl-9-BBN and 1-lithio-1-heptyne has been treated with methanesulphinyl chloride to provide mainly a cyclooctane
用甲磺酰氯处理三烷基炔基硼酸锂(1),以良好的收率得到内部乙炔(2)。该反应通过β-甲磺酰基乙烯基硼烷3进行,然后顺式消除甲磺酰基和二烷基硼基团。B-烷基-9-BBN和1-lithio-1-庚炔的反应混合物已用甲磺酰氯处理,主要提供了环辛烷衍生物6。根据甲烷磺酰氯方法中的空间因素解释了这一发现。