Chemistry of 1,4-Diamino-1,3-butadienes. II. A New Synthesis of N-Substituted Pyrroles<sup>1</sup>
作者:Marian F. Fegley、Newman M. Bortnick、Charles H. McKeever
DOI:10.1021/ja01572a045
日期:1957.8
Reaction of 1-[2-(vinyloxy)ethyl]-1H-pyrroles with trifluoroacetic anhydride
作者:E. Kh. Sadykov、N. A. Lobanova、V. K. Stankevich
DOI:10.1134/s1070428016040096
日期:2016.4
stereoselectivity of the reaction of 1-[2-(vinyloxy)ethyl]-1H-pyrroles with trifluoroaceticanhydride have been studied. The reaction with an equimolar amount of trifluoroaceticanhydride chemoselectively involves the free α-position of the pyrrole ring with formation of the corresponding α-trifluoroacetylpyrroles. In the reaction with 2 equiv of trifluoroaceticanhydride, acylation of both α-position
Abstract Nucleophilic addition of 1-(2-hydroxyalkyl)pyrroles to acetylene, an unactivated carbon–carbon triple bond, in the presence of a base has been studied. As a result an atom-economic synthetic method to obtain 1-[2-(vinyloxy)alkyl]pyrroles in good yields employing superbase, sodium or potassium hydroxide in dimethyl sulfoxide, systems has been developed. 1-[2-(Vinyloxy)alkyl]pyrroles are cleaved