An efficient [4+3] cycloaddition reaction of aza-o-quinodimethanes with C,N-cyclic azomethine imines: stereoselective synthesis of 1,2,4-triazepines
作者:L. Chen、G. M. Yang、J. Wang、Q. F. Jia、J. Wei、Z. Y. Du
DOI:10.1039/c5ra15903b
日期:——
An efficient [4+3] cycloaddition reaction of in situ generated aza-o-quinodimethanes with C,N-cyclicazomethineimines has been developed. A wide range of 1,2,4-triazepine derivatives were synthesized in high yields (81–99%).
Synthesis of Benzotriazepine Derivatives via [4+3] Cycloaddition of Aza-o-quinone Methide Intermediates and Azomethine Imines
作者:Dieter Enders、Ying Zhi、Kun Zhao、Tao Shu
DOI:10.1055/s-0035-1560809
日期:——
efficient and unprecedented [4+3] cycloadditionbetween in situ generated aza-o-quinone methides and azomethineimines via an aza-Michael/aminalization sequence has been developed. The scalable protocol allows to expeditiously assemble a valuable heterocyclic system incorporating tetrahydroisoquinoline and benzotriazepine scaffolds in good to excellent yields under mild conditions. An efficient and unprecedented