1-benzyl-2-crotonoyl-5,5-dimethyl-3-pyrazolidinone 、
N-hydroxy-4-methylbenzenecarboximidoyl chloride 在
nickel(II) perchlorate hexahydrate 、 (R)-N,N'-bis[4-(3,5-xylyl)-2-quinolylmethylene]-1,1'-binaphthyl-2,2'-diamine 作用下,
以
二氯甲烷 为溶剂,
反应 17.0h,
生成 (4R,5R)-5-[(1-benzyl-5,5-dimethyl-3-oxo-2-pyrazolidinyl)carbonyl]-3-p-tolyl-4-methyl-4,5-dihydroisoxazole 、
(4S,5S)-5-[(1-benzyl-5,5-dimethyl-3-oxo-2-pyrazolidinyl)carbonyl]-3-p-tolyl-4-methyl-4,5-dihydroisoxazole