Ring-opening of isoxazolidine system: Homologation of 3-aryl into 3-styryl nitrones via intermediate 5-hydroxy-isoxazolidines.
摘要:
High yield conversion of 3-aryl-5-ethoxy-isoxazolidines into 3-styryl nitrones has been achieved by 1,5 h refluxing in aq. H2SO4 or catalytic p-toluensulfonic acid/ethanol media. The rearrangement pathway is interpretable on the basis of the ring-opening process of intermediate 5-hydroxy-isoxazolidines. Formation of a masked 5-OH function has been also developed by basic or acid treatment of 5-acetoxy-isoxazolidines.
Cum,G. et al., Gazzetta Chimica Italiana, 1968, vol. 98, p. 782 - 794
作者:Cum,G. et al.
DOI:——
日期:——
Mukherjee, Shubhasish; Raunak; Dhawan, Ashish, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2004, vol. 43, # 12, p. 2670 - 2682
作者:Mukherjee, Shubhasish、Raunak、Dhawan, Ashish、Poonam、Prasad, Ashok K.、Olsen, Carl E.、Cholli, Ashok L.、Errington, William、Raj, Hanumantharao G.、Watterson, Arthur C.、Parmar, Virinder S.
DOI:——
日期:——
Hydrophobic effect on 1,3-dipolar cycloaddition reactions
作者:Pramod S. Pandey、Inder K. Pandey
DOI:10.1016/s0040-4039(97)01679-1
日期:1997.10
Rate and selectivity of 1,3-dipolar cyloaddition reactions of C,N-diphenyl-nitrone are influenced by hydrophobic effect. (C) 1997 Elsevier Science Ltd.