Solution- and Solid-Phase Synthesis of 4-Hydroxy-4,5-dihydroisoxazole Derivatives from Enantiomerically Pure <i>N</i>-Tosyl-2,3-aziridine Alcohols
作者:Paolo Righi、Noemi Scardovi、Emanuela Marotta、Peter ten Holte、Binne Zwanenburg
DOI:10.1021/ol0170152
日期:2002.2.1
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。