A STEREOSELECTIVE SYNTHESIS OF UNSATURATED PHOSPHONATES BY WITTIG-HORNER REACTIONS OF BISPHOSPHONYLMETHANE WITH 5-ARYL-(3-METHYL)-2E,4E-PENTADIENALS

Abstract

A new type of unsaturated phosphonates 5 were synthesized by the Wittig-Homer reactions of bisphosphonylmethane 4 with 5-aryl-2(E),4(E)-pentadienal and 5-aryl-3-methyl-2(E), 4(E)-pentadienal. The structures of all new compounds prepared were characterized by ¹H NMR, ³¹P NMR, ¹³C NMR, IR spectra, MS and elemental analyses, one of them was determined by X-ray diffraction analysis.

Key Words:

• Unsaturated phosphonates
• plant growth regulator
• Wittig-Homer reaction