CAN-mediated new, regioselective one-pot access to bicyclic cationic structures with 2,3-dihydro-1H-pyrazolo[1,2-a]pyrazol-4-ium core
作者:Mikhail I. Pleshchev、Nikita V. Das Gupta、Vladimir V. Kuznetsov、Ivan V. Fedyanin、Vadim V. Kachala、Nina N. Makhova
DOI:10.1016/j.tet.2015.09.033
日期:2015.11
[3+2]-cycloaddition of (2-bromo-2-nitrovinyl)arenes to N,N-cyclic azomethine imines, generated in situ by diaziridine ring opening in 6-Ar-1,5-diazabicyclo[3.1.0]hexanes or by metathesis of initially formed azomethine imine, followed by one-pot aromatization of the formed pyrazolidine ring.
一种新的,容易的,区域选择性硝酸铈铵(CAN)介导的单罐访问桥头肼双环阳离子结构与2,3-二氢-1- ħ -吡唑并[1,2一]吡唑-4-鎓阳离子和[的Ce 3+(NO 3)6 ] 3-的阴离子已经研制成功。该方法包括:[3 + 2] -环的(2-溴-2-硝基乙烯基)芳烃到N,N- -环状甲亚胺亚胺,在6-AR-1,5-二氮杂双环[3.1 diaziridine开环原位产生。 0]己烷或通过最初形成的偶氮甲亚胺的复分解反应,然后将形成的吡唑烷环一锅法芳构化。