AN EFFECTIVE STRATEGY FOR THE PREPARATION OF ALPHA,BETA-UNSATURATED HYDRAZONES AND PYRAZOLE DERIVATIVES - SYNTHETIC APPLICATIONS OF BETA-FUNCTIONALIZED PHOSPHORUS-COMPOUNDS
F. Palacios et al., AN EFFECTIVE STRATEGY FOR THE PREPARATION OF ALPHA,BETA-UNSATURATED HYDRAZONES AND PYRAZOLE DERIVATIVES - SYNTHETIC APPLICATIONS OF BETA-FUNCTIONALIZED PHOSPHORUS-COMPOUNDS, Tetrahedron, 50(44), 1994, pp. 12727-12742
beta-Enehydrazino phosphonium salts 3 as well as beta-hydrazono phosph
ine oxides 6 and phosphonates 7 are obtained from hydrazines, propargy
lphosphonium sales 2 and phosphorylated allenes 4 and 5. beta-Function
alized compounds 3,6 and 7 are used for the synthesis of a alpha,beta-
unsaturated hydrazones 1, pyrazoline 14 and pyrazole derivative 15.