Efficient Synthesis of Selenocarbonyl Compounds by Treating Carbonyl Compounds with Bis(1,5-cyclooctanediylboryl) Selenide
作者:Kazuaki Shimada、Norikazu Jin、Michiko Kawaguchi、Kumiko Dobashi、Yumi Nagano、Manabu Fujimura、Eiichi Kudoh、Tomonari Kai、Noboru Saito、Jun-ichi Masuda、Masaki Iwaya、Hiroyuki Fujisawa、Shigenobu Aoyagi、Yuji Takikawa
DOI:10.1246/bcsj.70.197
日期:1997.1
Selenoaldehydes and selenoketones were generated in situ, by treating aldehydes or ketones, respectively, with bis(1,5-cyclooctanediylboryl) selenide; the resulting selenocarbonyl compounds were trapped with 2,3-dimethyl-1,3-butadiene to give the corresponding [4+2] cycloadducts. The treatment of amides, an ester, and ketones possessing bulky substituents with the reagent also afforded the corresponding selenoamides, a selenoester, and sterically protected selones, respectively, in modest yields. On the other hand, a similar treatment of cinnamaldehyde with the reagent gave the 2,3-dihydroselenophene derivative, which originated from a [4+2]-type self-dimerization of in situ generated 3-phenyl-2-propeneselenal.
在原位生成硒醛和硒酮,通过将醛或酮与双(1,5-环辛烷二基)硒化物处理;由此得到的硒羰基化合物与2,3-二甲基-1,3-丁二烯反应,形成相应的[4+2]环加成物。将具有体积较大取代基的酰胺、酯和酮与该试剂处理,亦分别得到相应的硒酰胺、硒酯和体积保护的硒酮,产率适中。另一方面,将肉桂醛与该试剂处理,得到2,3-二氢硒苯衍生物,这源于原位生成的3-苯基-2-丙烯硒醛的[4+2]型自聚合反应。