THE PREPARATION OF 3-(2-PHENYLETHENYL)-1H-PYRAZOLES FROM DILITHIATED (3E)-4-PHENYL-3-BUTEN-2-ONE HYDRAZONES
摘要:
The phenyl-, carbomethoxy-, and carboethoxy-hydrazones of (3 E)-4-phenyl-3-buten-2-one [benzalacetone] were treated with excess lithium diisopropylamide, and the resulting 1,4-dianions were condensed with several aromatic esters, followed by acid cyclization of C-acylated intermediates, to afford substituted 3-(2-phenylethenyl)-1H-pyrazoles [3-styryl-pyrazoles].
THE PREPARATION OF 3-(2-PHENYLETHENYL)-1H-PYRAZOLES FROM DILITHIATED (3E)-4-PHENYL-3-BUTEN-2-ONE HYDRAZONES
摘要:
The phenyl-, carbomethoxy-, and carboethoxy-hydrazones of (3 E)-4-phenyl-3-buten-2-one [benzalacetone] were treated with excess lithium diisopropylamide, and the resulting 1,4-dianions were condensed with several aromatic esters, followed by acid cyclization of C-acylated intermediates, to afford substituted 3-(2-phenylethenyl)-1H-pyrazoles [3-styryl-pyrazoles].