Microwave assisted synthesis of 5-hydroxy-5-trichloromethyl-4,5-dihydroisoxazoles
作者:Marcos A.P Martins、Paulo Beck、Wilson Cunico、Claudio M.P Pereira、Adilson P Sinhorin、Rogério F Blanco、Rodrigo Peres、Helio G Bonacorso、Nilo Zanatta
DOI:10.1016/s0040-4039(02)01555-1
日期:2002.9
A series of 13 5-hydroxy-5-trichloromethyl-4,5-dihydroisoxazoles have been synthesized in 78-96% yield by environmentally benign microwave induced techniques involving the cyclocondensation of 4-alkoxy-1,1,1-trichloro-3-alken-2-ones [CCl3C(O)C(R-2)=C(R-1)OR, where R-2=H, alkyl; R-1=H, alkyl, aryl and R=H, alkyl] with hydroxylamine using toluene as solvent. The advantages obtained by the use of microwave irradiation in relation to a classical method were demonstrated. (C) 2002 Elsevier Science Ltd. All rights reserved.
Martins, Marcos A. P.; Flores, Alex F. C.; Freitag, Rogerio, Journal of Heterocyclic Chemistry, 1995, vol. 32, # 3, p. 731 - 734
作者:Martins, Marcos A. P.、Flores, Alex F. C.、Freitag, Rogerio、Zanatta, Nilo