Intramolecular cycloaddition/rearrangement cascade from gold(<scp>iii</scp>)-catalysed reactions of propargyl aryldiazoesters with cinnamyl imines
作者:Huang Qiu、Hadi Arman、Wenhao Hu、Michael P. Doyle
DOI:10.1039/c8cc07885h
日期:——
Conjugated cycloheptene-1,4-dione-enamines are cycloaddition products from a surprising rearrangement in a Au(III)-catalysed reaction between propargyl aryldiazoacetates and cinnamyl imines. This complex transformation occurs through an initial rapid Au(III)-catalysed [4+3]-cycloaddition to form dihydroazepinyl aryldiazoacetates followed by a subsequent uncatalyzed domino transformation that occurs
共轭的环庚烯-1,4-二酮-烯胺是在炔丙基芳基重氮乙酸酯和肉桂基亚胺之间的Au(III)催化反应中出乎意料的重排而得的环加成产物。通过最初的快速Au(III)催化的[4 + 3]-环加成反应形成二氢a庚啶基芳基重氮乙酸酯,然后依次进行[3 + 2]-环加成-/氮挤出和酰氧基迁移,发生随后的未催化的多米诺骨牌转化,从而实现了这种复杂的转化/ retro-Michael加法/互变异构。