Efficient synthesis of isoxazolidine-substituted bisphosphonates by 1,3-dipolar cycloaddition reactions
作者:O. Bortolini、I. Mulani、A. De Nino、L. Maiuolo、M. Nardi、B. Russo、S. Avnet
DOI:10.1016/j.tet.2011.05.098
日期:2011.8
Several bisphosphonates bearing a substituted isoxazolidine ring have been synthesized in good yield by direct 1,3-dipolar cyclization reaction, under microwaves catalysis, in the absence of solvent. The method allows the simultaneous incorporation, on the geminal position of the bisphosphonate framework, of a basic nitrogen and of an oxygen atom, as third hook. Hydrophobicity-hydrophilicity of BPs is discussed with the help of distribution coefficients. (C) 2011 Elsevier Ltd. All rights reserved.