N-methylhydroxylamine hydrochloride in boiling ethanol-pyridine (1:1) solution results in elimination of the CH3NH2fragment, affording products of oxidative hydrolysis 4a, 4b, and 6b, while acid-catalyzed reaction of isoxazolidines 2a, 3a and 5b leads to rearrangement involving the N-CH3 group with formation of the perhydro-3,1-oxazine derivatives 8a, 9a and 10b.
在沸腾的
乙醇-
吡啶(1:1)溶液中用N-甲基
羟胺盐酸盐处理甾体
异恶唑烷3a,3b和5b,可消除CH 3 NH 2片段,提供氧化
水解产物4a,4b和6b,同时酸
异恶唑烷2a,3a和5b的催化反应导致涉及N-CH 3基团的重排,并形成过氢-3,1-恶嗪衍
生物8a,9a和10b。