Olive-Shaped Organic Cages: Synthesis and Remarkable Promotion of Hydrazone Condensation through Encapsulation in Water
作者:Yan-Yan Xu、Hong-Kun Liu、Ze-Kun Wang、Bo Song、Dan-Wei Zhang、Hui Wang、Zhiming Li、Xiaopeng Li、Zhan-Ting Li
DOI:10.1021/acs.joc.0c02792
日期:2021.3.5
neutral molecules. Such encapsulation has been applied for the promotion of both two- or three-component hydrazone condensation in water. For two-component reactions, the yields of the resulting monohydrazones are increased from 5–10 to 90–96%. For three-component reactions of hydrazinecarbohydrazide with 11 aromatic aldehydes, in the presence of the organic cages, the bihydrazone products can be produced
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