<scp>Palladium‐Catalyzed</scp> [4+2] and [6+2] Dipolar Cycloadditions for the Construction of Benzo[<i>d</i>]isothiazole 1,<scp>1‐Dioxide</scp> Fused 1,<scp>3‐Oxazinanes</scp> and 1,<scp>3‐Oxazocanes</scp><sup>†</sup>
作者:Lei Chen、Hongling Xie、Yu Xue、Zhengyu Han、Jianwei Sun、Hai Huang
DOI:10.1002/cjoc.202300668
日期:2024.4.15
The Pd-catalyzed dipolar cycloaddition represents a significant synthetic strategy for the construction of useful heterocyclic compounds. This study developed the dipolar [4+2] and [6+2] cycloaddition reactions of benzo[d]isothiazole 1,1-dioxides (BDs) leading to the synthesis of BD-fused 1,3-oxazinane and 1,3-oxazocane derivatives, respectively. In particular, the synthesis of BD-fused 1,3-oxazinanes
Pd 催化的偶极环加成代表了构建有用杂环化合物的重要合成策略。本研究开发了苯并[ d ]异噻唑1,1-二氧化物(BD)的偶极[4+2]和[6+2]环加成反应,从而合成了BD稠合的1,3-恶嗪烷和1,3-分别是恶唑烷衍生物。特别是,BD-稠合 1,3-恶嗪烷的合成表现出区域选择性和对映选择性特征,从而产生具有良好产率、对映选择性和区域选择性(如果适用)的产品。此外,本工作中开发的[6+2]环加成反应代表了基于BDs合成中等大小环化合物的第一个策略。