Hashmi, Syed M. A.; Wazeer, Mohammed I. M.; Hussain, M. Sakhawat, Journal of the Chemical Society. Perkin Transactions 2 (2001), 1999, # 4, p. 877 - 883
作者:Hashmi, Syed M. A.、Wazeer, Mohammed I. M.、Hussain, M. Sakhawat、Reibenspies, Joseph H.、Perzanowski, Herman P.、Ali, Sk. Asrof
DOI:——
日期:——
Peracid induced ring opening of some isoxazolidines and oxidation of saturated 1,3-oxazines to new heterocyclic nitrones
作者:Syed M.A. Hashmi、Sk.Asrof Ali、Mohammed I.M. Wazeer
DOI:10.1016/s0040-4020(98)00789-3
日期:1998.10
equilibrium mixture of nitrone and its six-membered ring hydroxylamine tautomer; the ratio of which is found to depend on the substituents. The tautomeric cyclic hydroxylamine has been converted to a new class of nitrones by oxidation with mercury (II) oxide or p-benzoquinone. One of the cyclic hydroxylamine lacking hydrogen at the α-carbons has been oxidized to nitroxide spin label.
α-Alkoxy cyclic nitrones (5), stabilized by the presence of hydroquinone, underwent face-, regio- and stereo-selective cycloaddition reaction with normal alkenes to afford bicyclic isoxazolidines (8) efficiently.