First Reactions of 2,2′-Bisindolyls with Electrophilic Azo Compounds and Diethyl Mesoxalate
作者:Ulf Pindur、Mung-Hwa Kim
DOI:10.1002/ardp.19923250609
日期:——
Conformations and some electronic properties of the 2,2′‐bisindolyls 6 were calculated for the prediction of probable Diels‐Alder reactivity, in analogy to previous work on 2‐vinylindoles. First reactions with dienophiles revealed that compounds 6 did not participate in [4 + 2]cycloadditions but rather underwent simple electrophilic substitutions at the enamine function with, above all, some heterodienophiles
First reactions of vinylindoles with diethyl mesoxalate, nitrosobenzene, and chlorosulfonyl isocyanate: New functionalized and []annellated indoles
作者:Ulf Pindur、Myung-Hwa Kim
DOI:10.1016/s0040-4020(01)89519-3
日期:1989.1
3-vinylindoles via electrophilicsubstitution to give new, functionalized and annellated indoles in high regioselectivities. Regio-controlled dimerization processes occur in the reactions of the vinylindoles 5a and 8a. Nitrosobenze reacts with 2- and 3-vinylindoles in a multi-stage sequence including regiospecific tandem hetero-Diels-alder reactions to give the new, 2,3-difunctionalized indoles 11 and 12 which