A new application of Baylis–Hillman alcohols to a diastereoselective synthesis of 3-nitrothietanes
作者:Ankita Rai、Lal Dhar S. Yadav
DOI:10.1016/j.tet.2012.01.062
日期:2012.3
Three key reactions, the generation of a nucleophile, an thia-Michael addition and an intramolecular cyclisation, were used to achieve an efficient one-pot diastereoseletive synthesis of 3-nitrothietanes. Thus, Baylis–Hillman alcohols and their aldehydes were reacted with either O,O-diethyl hydrogen phosphorodithioate or O,O-diethyl hydrogen phosphorodithioate in combination with a task-specific ionic
使用三个关键反应,即亲核试剂的生成,噻吩-迈克尔加成反应和分子内环化反应,来实现3-硝基硫杂环丁烷的高效一锅非对映异构合成。因此,将Baylis-Hillman醇及其醛与O,O-二乙基二硫代磷酸氢氧根或O,O-二乙基二硫代磷酸氢氧根与特定任务离子液体[bmim] X-Y结合反应,得到相应的2,3 -二-或2,3,4-三取代的硫杂环丁烷。该反应收率高,并以有利于反式异构体的完全非对映选择性进行。