Mesomeric betaine – N-heterocyclic carbene interconversions of 1,2,4-triazolium-phenolates. Sulfur, selenium, and borane adduct formation
作者:Ming Liu、Martin Nieger、Andreas Schmidt
DOI:10.1039/c4cc08032g
日期:——
The conjugated mesomeric betaines 2-(1-phenyl-4H-1,2,4-triazolium-4-yl)phenolates are masked N-heterocyclic carbenes of 1,2,4-triazole which can be trapped as thiones and selenones. Reaction with triethylborane and triphenylborane resulted in the formation of first representatives of a new zwitterionic heterocyclic ring system, benzo[e]1,2,4-triazolo[3,4-c][1,4,2]oxazaborinium-4-ide, as a formal trapping
共轭甜菜碱2-(1-苯基-4H-1,2,4-三唑-4-基)酚盐是1,2,4-三唑的被掩蔽的N-杂环卡宾,它们可以作为硫酮和硒酮被捕集。与三乙基硼烷和三苯基硼烷的反应导致形成新的两性离子杂环体系的首个代表,即苯并[e] 1,2,4-三唑并[3,4-c] [1,4,2]恶唑硼鎓-4-化物,作为阴离子N杂环卡宾的正式捕获产物。