1,3-Dipolar [3+3] Cycloaddition of 1,4-Benzodiazepinone-Based Nitrones with α-Halohydroxamates for Diastereoselective Synthesis of Novel d-Edge Heterocycle-Fused 1,4-Benzodiazepinones
作者:Hong-Wu Zhao、Heng Zhang、Lu-Yu Cai、Zhe Tang、Xiao-Zu Fan、Hui-Hui Wu、Xiao-Fan Bi
DOI:10.1055/a-1642-0598
日期:2021.12
Promoted by K2CO3 (2.0 equiv), the 1,3-dipolar [3+3] cycloaddition between 1, 4-benzodiazepinone-based nitrones and α-halohydroxamates processed smoothly under the mild reaction conditions and delivered structurally novel and complex cis- or trans-configured d-edge heterocycle-fused 1,4-benzodiazepinones in up to >99% isolated yield with >20:1 dr. The relative configuration of the title chemical entities
在 K2CO3 (2.0 equiv) 的推动下,1, 4-苯二氮卓酮基硝酮和 α-卤代异羟肟酸酯之间的 1,3-偶极 [3+3] 环加成反应在温和的反应条件下顺利进行,并提供结构新颖且复杂的顺式或反式- 配置的 d-edge 杂环稠合 1,4-苯二氮杂酮,分离产率高达 >99%,>20:1 dr。使用单晶 X 射线结构分析清楚地确定了标题化学实体的相对构型。假设反应机制解释了所获得的顺式或反式构型的 d-edge 杂环稠合 1,4-苯二氮杂酮的非对映选择性生产。