situ by base induced dehydrohalogenation of the corresponding 2-bromo- and 2-chloro-acetylphosphonate- tertbutoxycarbonyl hydrazones are intercepted by electron rich alkenes and heterocycles in hetero Diels-Alder reactions, producing tetrahydopyridazine-3-phosphonates or open chain α-hydrazono phosphonates.
瞬态偶氮
乙烯基膦酸酯,由相应的 2-
溴-和 2-
氯-
乙酰基膦酸酯-叔丁氧基羰基腙的碱诱导脱卤化氢原位生成,在杂 Diels-Alder 反应中被富电子烯烃和杂环拦截,产生四氢
哒嗪-3-
膦酸酯或开链α-腙
膦酸盐。