New strong organic acceptors by cycloaddition of TCNE and TCNQ to donor-substituted cyanoalkynes
作者:Philippe Reutenauer、Milan Kivala、Peter D. Jarowski、Corinne Boudon、Jean-Paul Gisselbrecht、Maurice Gross、François Diederich
DOI:10.1039/b714731g
日期:——
Donor-substituted 1,1,2,4,4-pentacyanobuta-1,3-dienes and a cyclohexa-2,5-diene-1,4-diylidene-expanded derivative were prepared by a [2 + 2] cycloaddition of tetracyanoethene (TCNE) or 7,7,8,8-tetracyanoquinodimethane (TCNQ) to anilino-substituted cyanoalkynes, followed by retro-electrocyclisation; they feature intense bathochromically-shifted intramolecularcharge-transfer bands and undergo their