N-tosyl-2,3-aziridine alcohols are directly converted into 4-hydroxy-4,5-dihydroisoxazole 2-oxides through oxidation to the corresponding aldehydes followed by in situ tandem nitroaldol-intramolecular cyclization. This study was concerned with (i) the selection of a suitable aziridine activation, (ii) the preparation of the target 4-hydroxy-4,5-dihydroisoxazole derivatives in solution, and (iii) the elaboration
[反应:见正文]对映体纯的N-
甲苯磺酰基-2,3-
氮丙啶醇通过氧化成相应的醛,然后进行原位串联的硝基羟醛-分子内环化反应,直接转化为
4-羟基-4,5-二氢
异恶唑2-氧化物。这项研究涉及(i)选择合适的
氮丙啶活化剂,(ii)在溶液中制备目标
4-羟基-4,5-二氢
异恶唑衍
生物,以及(iii)使用羟基Merrifield负载的硝基
乙酸酯。