dehydrohalogenation of α-halo-N-alkylhydroxamic acids was designed. [4+2] cycloadditions of this heterodiene to olefins provide a facile route to construct six-membered heterocycles containing an N–O bond and a new protocol for 1,2-syn carbohydroxylate alkenes with a hydroxyl and acetamide group. DFT calculations support a concerted cycloaddition pathway and the solvent HFIP can stabilize the transition state
一种新的类型生成两性离子nitrosoalkene的原位从α卤代-脱卤化氢Ñ -alkylhydroxamic
氨基酸被设计。该杂二烯与烯烃的[4 + 2]环加成反应为构建含N–O键的六元杂环和具有羟基和乙酰胺基的1,2-合成碳羟基化烯烃的新方案提供了一条简便的途径。DFT计算支持一致的环加成途径,溶剂HFIP可以通过H键相互作用来稳定过渡态。