A convenient preparation of N‐Alkyl‐2,5‐dihydroisoxazoles from O‐Allyl oximes

Abstract The organoselenium‐induced ring‐closure reaction of O ‐allyl oximes gave cyclic iminium salts, which reacted with Grignard reagents to produce N ‐alkyl‐4‐phenylselenoisoxazolidines. 2,5‐Dihydroisoxazoles could be obtained in good yields by subsequent selenoxide syn ‐elimination.