Enhanced synthesis of oxo-verdazyl radicals bearing sterically-and electronically-diverse C3-substituents
作者:Rebecca O. Fuller、Madeleine R. Taylor、Margot Duggin、Alex C. Bissember、Allan J. Canty、Martyna M. Judd、Nicholas Cox、Stephen A. Moggach、Gemma F. Turner
DOI:10.1039/d1ob01946e
日期:——
presence of strong electron-donating substituents and electron rich heterocycles, result in a significant reduction in yield during both the alkylation and ringclosure steps. This can, in part, be alleviated by milder alkylation conditions and further substitution of the aryl group. In comparison, more facile formation of the tetrazine ring was observed with examples containing electron-withdrawing groups