Selective synthesis of 5-aryl-10-(nitromethyl) substituted 15-azatripyrrane, 15-oxatripyrrane and 15-thiatripyrrane: access to nitromethyl functionalized A<sub>3</sub>B-porphyrins
A chemical strategy toward the selectivesynthesis of unsymmetrical tripyrranes was developed for the formation of meso-aryl and -nitromethyl substituted A3B porphyrins. The iodine catalyzed addition of meso-substituted dipyrromethanes to nitrovinylarenes to generate unsymmetrical 5-aryl-10-(nitromethyl) substituted 15-azatripyrranes, 15-oxatripyrranes and 15-thiatripyrrane under mild conditions has
Direct Transformation of Primary Nitro Compounds into Nitriles with Sodium Dithionite
作者:Baris Temelli、Canan Unaleroglu
DOI:10.1055/s-0033-1370874
日期:——
Abstract A new and practical directtransformation of primarynitrocompounds into nitriles with sodium dithionite is described. The reaction is simple, convenient and eliminates the use of expensive and moisture-sensitive reagents. A new and practical directtransformation of primarynitrocompounds into nitriles with sodium dithionite is described. The reaction is simple, convenient and eliminates
Direct alkylation of pyrrole with vinyl substituted aromatics: versatile precursors for the synthesis of porphyrinoid macrocycles
作者:Seong-Jin Hong、Seung-Doo Jeong、Jaeduk Yoo、Jong Seung Kim、Juyoung Yoon、Chang-Hee Lee
DOI:10.1016/j.tetlet.2008.04.119
日期:2008.6
5-Substituted dipyrromethane analogues (8), (23) and (25) were synthesized by the reaction of 2-vinylpyrroles, 2-vinylthiophene or 2-vinylbenzenes with excess pyrrole in the presence of Lewis acids. Accordingly, tripyrromethane analogues could be obtained by starting with 2,5-divinyl thiophene or 2,6-divinylbenzenes. The reaction usually gave moderate yields and catalyst-dependent was seen in some