Photolysis of some unsymmetrical phosphinic azides in methanol
作者:Martin J.P. Harger、Sally Westlake
DOI:10.1016/0040-4020(82)80195-6
日期:1982.1
less bulky. For t-butylmethylphosphic azide there is very little preference for migration of But relative to Me. Small amounts of unrearranged products such as ButPhP(O)NHOMe and ButPhP(O)NH2 are generally produced in the photolyses, together with the methyl phosphinates RPhP(O)OMe (major product when R = Me) resulting from (non-photochemical) solvolysis of the azide.
当alkylphenylphosphinic酸PRHP(O)N 3(R =甲基,乙基,镨我,或卜吨)在MeOH中光解任一烷基或苯基可以从P到N的Curtius重状重排迁移。产品的组成表明,烷基R的迁移是优选的。但是,该偏好并不大,并且随着R改变Bu t →Pr i →Et→Me(相对于Ph的大约迁移能力分别为2.1、1.7、1.3和1.2)而降低,这可能是因为PhP键具有更好的能力当R的体积较小时,可以假设Ph迁移具有正确的构象。对于叔丁基甲基叠氮化物,Bu t的迁移非常少。相对于我。少量未重排的产物如卜吨PHP(O)NHOMe和卜吨PHP(O)NH 2,一般在photolyses产生,连同甲基膦酸盐RPHP(O)OME(主要产物,当R = Me)的从所得(非光化学)叠氮化物的溶剂分解。
Base-induced rearrangement of the O-methanesulphonyl derivatives of N-(alkylphenylphosphinoyl)hydroxylamines. Highly selective migration of the phenyl group
作者:Martin J. P. Harger、Adrian Smith
DOI:10.1039/c39840001140
日期:——
The N-(alkylphenylphosphinoyl)-O-methanesulphonylhydroxylamines RPhP(O)NHOSO2Me (R = Me, Et, or Pri) react readily with MeNH2 or NaOMe–MeOH to give products resulting from phenyl, but not alkyl, migration.
The hydroxy group of methyl 1-hydroxyalkyl-(phenyl)-phosphinates 3, prepared from methyl phenylphosphinate 1 and aldehydes or ketones 2, is directly deoxygenated on treatment with diphosphorus tetraiodide to give the methyl alkyl-(phenyl)-phosphinates 4.