(±)-4,5,5-Trimethyl-1-pyrroline-1-oxide reacted readily with ethyl 4,5,6,7-tetra-O-acetyl-trans-2,3-dehydro-2,3-dideoxy-L(−)-arabinoheptenoate in anhydrous benzene to give a mixture of two diastereomeric isoxazolidines, [2α,3β,3aα,5α]- and [2α,3β,3aα,5β]-ethyl hexahydro-2-(1,2,3,4- tetraacetoxybutyl)-5,6,6-trimethylpyrrolo[1,2- b] isoxazole-3-carboxylate. The structures and configurations of both diastereomers were determined through the use of the (1H–1H) COSY, (13C–1H) HETCOR and NOEDS techniques.
(±)-4,5,5-三甲基-1-
吡咯啉-1-氧化物很容易与乙基4,5,6,7-四-O-乙酰基-反式-2,3-脱氢-2,3-二脱氧基反应-L(−)-阿拉伯
庚烯酸酯在无
水苯中得到两种非对映
异恶唑烷的混合物,[2α,3β,3aα,5α]-和[2α,3β,3aα,5β]-乙基六氢-2-(1,2, 3,4-四乙酰氧基丁基)-5,6,6-三甲基
吡咯并[1,2-b]
异恶唑-3-
羧酸酯。两种非对映异构体的结构和构型均通过使用 (1H–1H) COSY、(13C–1H) HETCOR 和 NOEDS 技术确定。