A Facile Synthesis of a Spironitrone
and a Study of Its Cycloaddition and Nucleophilic Addition
Reactions
作者:Margaret Brimble、Daryl Crimmins、Ivaylo Dimitrov、Patrick O’Connor、Vittorio Caprio
DOI:10.1055/s-0028-1083151
日期:——
methyl cyclohexanecarboxylate with 1,4-dibromobutane followed by conversion of the methyl ester to an oxime. Spironitrone 5 undergoes facile 1,3-dipolar cycloaddition to a range of olefins to form a range of spirocyclic isoxazolidines. Nucleophilic addition of several Grignard reagents to spironitrone 5 provided access to a series of alkyl-substituted spirohydroxylamines.
报道了通过微波辅助溴肟10分子内烷基化合成螺硝酮5。溴肟是通过用 1,4-二溴丁烷将环己烷羧酸甲酯烷基化,然后将甲酯转化为肟来制备的。螺硝酮 5 与一系列烯烃进行简单的 1,3-偶极环加成反应,形成一系列螺环异恶唑烷。几种格氏试剂与螺硝酮 5 的亲核加成提供了获得一系列烷基取代的螺羟胺的途径。