发现在P(p- MeC 6 H 4)3作为配体的存在下,Pd(0)催化的烯丙基乙烯基硒化反应有效地进行,从而得到相应的2-硒代甲基-1,3-二烯。该反应是高度区域选择性的,并且将硒化乙烯基添加到丙二烯的末端双键上,以仅在内部碳处引入乙烯基并且在末端碳处引入硒部分。乙烯基硒化物的双键的立体化学被完美保留。
Organylzinc Chalcogenolate Promoted Michael-Type Addition of α,β-Unsaturated Carbonyl Compounds
作者:Vanessa Lóren Nunes、Ingryd Cristina de Oliveira、Olga Soares do Rêgo Barros
DOI:10.1002/ejoc.201301497
日期:2014.3
chalcogenide compounds promoted by organylzinc chalcogenolates. In this protocol, reductive cleavage of diorganyl dichalcogenide bonds by the Zn/NH4OH system led to organylzinc chalcogenolates. The reaction was performed with propiolic acids and esters and afforded β-organochalcogenacrylic acids and esters under mild basic conditions. The stereochemistry corresponded to anti-Markovnikov addition of the organyl