Pyrido[1,2-c][1,2,4]triazol-3-ylidene: reactivity and its application in organocatalysis and organometallic catalysis
作者:Siping Wei、Bo Liu、Dongbing Zhao、Zhen Wang、Jie Wu、Jingbo Lan、Jingsong You
DOI:10.1039/b910073c
日期:——
The reactivity and catalytic performance of 2-ethylpyrido[1,2-c][1,2,4]-triazol-3-ylidene 6 have been comprehensively investigated. The carbene 6 has shown unusual properties owing to the effect of the pyrido-annulation. While formohydrazide 8 and hydrazine 9 are obtained via the destruction of the triazole skeleton of the carbene, 3-((1Z,3E)-4-(1H-pyrrol-1-yl)buta-1,3-dienyl)-1-ethyl-1H-1,2,4-triazole 10 is achieved through the cleavage of the C–N bond of the pyridine ring. The carbene 6 has turned out to be a powerful catalyst in a variety of organocatalyzed and Pd(II)-catalyzed transformations.
2-乙基吡啶并[1,2-c][1,2,4]三唑-3-亚基6的反应性和催化性能已经得到了全面的探究。由于吡啶并环的影响,卡宾6展现出了不寻常的性质。在破坏卡宾的三唑骨架后,得到了福莫肼8和肼9,而通过吡啶环C-N键的断裂,获得了3-((1Z,3E)-4-(1H-吡咯-1-基)丁-1,3-二烯基)-1-乙基-1H-1,2,4-三唑10。卡宾6被证明在多种有机催化和小二催化(Pd(II)催化)反应中是一种强大的催化剂。