The reactions of 2-(2-oxoalkylseleno)benzothiazoles with allylic Grignard reagents in the presence of BF3·OEt2 gave the corresponding 2-[(2-alkyl-2-hydroxy-4-pententyl or 2-alkyl-2-hydroxy-4-methyl-4-pentenyl)seleno]benzothiazoles which, on treatment with Ph3P and NaH, afforded 1,4-dienes in good to excellent yields.
在
BF3·OEt2存在的条件下,2-(2-氧代烷基
硒)
苯并噻唑与烯丙基
格氏试剂反应,生成相应的2-[(2-烷基-2-羟基-4-
戊烯基或2-烷基-2-羟基-4-甲基-4-
戊烯基)
硒]
苯并噻唑,这些化合物在Ph3P和NaH处理后,能以良好至优异的产率得到1,4-二烯。