reagent with an equimolar amount of sodium 2-bromoalkanolates (which were prepared in situ from the reaction of bromoalkanol and NaH) in THF gave five- or six-membered PSeOC n (n = 2 or 3) phosphorus–selenium heterocycles 3 and 4 in good yields. Woollins’ reagent reacting with one equivalent of conjugated 1,3-dienes led to the formation of different end products: with 1,4-diphenylbuta-1,3-diene giving a
用等摩尔量的 2-
溴链烷醇
钠(由
溴链烷醇和 NaH 反应原位制备)在 THF 中处理
Woollins 试剂,得到五元或六元 PSeOC n(n = 2 或 3)
磷-
硒杂环 3和 4 的良好收益。
Woollins 试剂与一当量的共轭 1,3-二烯反应导致形成不同的终产物:1,4-二苯基丁-1,3-二烯生成五元 2,3,5-三苯基-4-
苯乙烯基-1,2,5-
硒二
磷烷 2,5-二
硒化物;然而,
2,3-二苄基-1,3-丁二烯提供4,5-二苄基-2-苯基-3,6-二氢-2H -1,2-
硒代膦2-
硒化物作为主要的可分离产物。用一当量的未共轭 2,
5-二甲基-1,5-己基二烯在
甲苯中回流
Woollins 试剂,生成 P-Se
杂环化合物 3-methyl-3-(3-methylbut-3-en-1-yl)-2, 5
-二苯基-1,2, 5-selenadiphospholane 2,5-diselenide