Copper-Catalyzed Cycloisomerization of Unactivated Allene-Tethered <i>O</i>-Propargyl Oximes: A Domino Reaction Sequence toward the Synthesis of Hexahydropyrrolo[3,4-<i>b</i>]azepin-5(4<i>H</i>)-ones
作者:Ali Nikbakht、Kamran Amiri、Hormoz Khosravi、Yirong Zhou、Saeed Balalaie、Bernhard Breit
DOI:10.1021/acs.orglett.1c00837
日期:2021.5.7
developed for the synthesis of hexahydropyrrolo[3,4-b]azepin-5(4H)-ones. This one-pot domino reaction proceeds via a [2,3]-sigmatropic rearrangement, a [3 + 2] cycloaddition, and another [3,3]-sigmatropic rearrangement. The methodology offers a practical and straightforward route for the rapid assembly of both ring components of the fused bicyclic motifs from acyclic precursors by simultaneously forming
已开发了一种新型的铜催化的未活化的丙二烯系的O-炔丙基肟肟化的环异构体,用于合成六氢吡咯并[3,4- b ] azepin-5(4 H)-ones。一锅多米诺反应通过[2,3]-σ重排,[3 + 2]环加成和另一个[3,3]-σ重排进行。该方法为在无环前体中同时形成四个新键(一个C═O,一个C═N和两个CC键)快速组装来自无环前体的稠合双环基序的两个环成分提供了一条实用而直接的途径。一小步。