Syntheses and Structure of 8-, 7-, and 6-Membered Silacycloallenes
Syntheses and Structure of 8-, 7-, and 6-Membered Silacycloallenes
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8、7、6 元硅杂环联烯的合成和结构
DOI：
10.1021/ja00059a073
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发表时间：
1993
影响因子：
15
通讯作者：
T. Barton
中科院分区：
文献类型：
--
作者：
Y. Pang;S. Petrich;V. Young;M. Gordon;T. Barton
受最近在四硅杂环己炔的合成和结构测定方面取得的成功的鼓舞，作者们继续致力于合成应变硅杂环联烯，并在此报告了第一个含有 1,2-二烯单元的可分离 6 元和 7 元环的例子。他们合成成功的一个关键因素是发现1,3-双(三甲基甲硅烷基)-1-丙炔在用乙醚中的2当量正丁基锂处理后定量转化为联二烯基阴离子。用α，ω-二氯聚硅烷猝灭联二烯基二阴离子在每种情况下都导致相应环状丙二烯的良好产率。 15 条参考文献、3 张图、1 个标签。
Encouraged by their recent success in the synthesis and structure determination of a tetrasilacyclohexyne, the authors have pursued the syntheses of strained silacycloallenes and report herein the first examples of isolable 6- and 7-membered rings containing 1,2-diene units. A key factor in their synthetic success was the finding that 1,3-bis(trimethylsilyl)-1-propyne is quantitatively converted to an allenyl dianion upon treatment with 2 equiv of n-BuLi in ether. Quenching of the allenyl dianion with [alpha],[omega]-dichloropolysilanes leads in each case to good yields of the corresponding cyclic allenes. 15 refs., 3 figs., 1 tab.