Synthesis and molecular structure of 3-(2-benzyloxy-6-hydroxyphenyl)-5-styrylpyrazoles. Reaction of 2-styrylchromones and hydrazine hydrate
作者:Diana C.G.A. Pinto、Artur M.S. Silva、JoséA.S. Cavaleiro、Concepción Foces-Foces、Antonio L. Llamas-Saiz、Nadine Jagerovic、José Elguero
DOI:10.1016/s0040-4020(99)00546-3
日期:1999.8
3-(2-Benzyloxy-6-hydroxyphenyl)-5-styrylpyrazoles 7a-e were prepared from the reaction of 2-styrylchromones and hydrazine hydrate. 3-(2-Benzyloxy-6-hydroxyphenyl)-5-(2-phenylethyl)-pyrazoles 8a,d,e and 3-(2-benzyloxy-β,6-dihydroxystyryl)-5-aryl-2-pyrazolines 9a-e were also obtained as by-products. The crystal and molecular structure of two 3-(2-benzyloxy-6-hydroxyphenyl)-5-styrylpyrazoles 7a,b have