Diastereoselective Cascade Assembly of Functionalized Pyrano[3,4-<i>c</i>]pyrrole Derivatives
作者:Mikhail Yu. Ievlev、Oleg V. Ershov、Viktor A. Tafeenko
DOI:10.1021/acs.orglett.6b00867
日期:2016.4.15
A novel convenient approach for the synthesis of densely functionalized pyrano[3,4-c]pyrrole derivatives was developed. Cascade transformation of the simple adducts of tetracyanoethylene (TCNE) and ketones (4-oxoalkane-1,1,2,2-tetracarbonitriles) in the presence of aldehyde under the action of acetic acid led to the diastereoselective formation of targeted pyrano[3,4-c]pyrroles. The reaction pathway
开发了一种新型的方便的方法,用于合成高密度官能化的吡喃并[3,4- c ]吡咯衍生物。在醛存在下,在乙酸的作用下,四氰基乙烯(TCNE)和酮(4-氧代烷-1,1,2,2-四甲腈)的简单加合物的级联转化导致非对映选择性形成目标吡喃[3, 4- c ]吡咯。深入研究了反应途径,并提出了与实验相符的中间体。