Copper(II)/DBU Relay Catalyzed Annulation of α-Carbonyl-γ-alkynyl Sulfoxonium Ylides for Accessing <i>N</i>-Sulfonamido 2<i>H</i>-Isoindoles
作者:Peng Zhou、Wei-Tao Yang、Wen-Juan Hao、Bo Jiang
DOI:10.1021/acs.orglett.3c03479
日期:2023.12.1
A copper(II)/DBU relay catalyzed annulation of α-carbonyl-γ-alkynyl sulfoxonium ylides as a new class of sulfoxonium ylide reagents with sulfonyl hydrazides is reported, enabling intramolecular oxygen migration to produce a series of N-sulfonamido 2H-isoindoles with good yields. The present annulation proceeded readily by combining the Cu(II)-catalyzed 6-endo-dig oxo-cyclization with the DBU-catalyzed
报道了铜(II)/DBU中继催化α-羰基-γ-炔基亚砜叶立德成环作为一类新型亚砜叶立德试剂与磺酰肼的反应,使分子内氧迁移产生一系列N-磺酰胺基2H-异吲哚具有良好的产量。通过将 Cu(II) 催化的 6-内地物氧环化与 DBU 催化的异色烯骨架重排相结合,本环化很容易进行,从而形成多个新的化学键。