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Communication | Regular issue | Vol 19, No. 10, 1982, pp.1869-1872
Published online, 1st January, 1970
DOI: 10.3987/R-1982-10-1869
Studies on as-Triazine Derivatives. III. Preparation of 3-Alkenyl-1,2,4-triazine Derivatives by Means of Witting Reaction

Shoestu Konno, Estuko Takaharu, Yuichi Aizawa, and Hiroshi Yamanaka

*Pharmaceutical Institute, Tohoku University, Aobayama, Sendai 980-8578, Japan

Abstract

The reaction of 3-trichloromethyl-5,6-diphenyl-1,2,4-triazine with triphenylphosphine proceeded reductively, and α-[3- (5,6-diphenyl-1,2,4-triazinyl)]methylenetriphenylphosphorane was obtained as stable, yellow prisms. The phosphorane smoothly reacted with various aldehydes in boiling benzene to give the corresponding 3-alkenyl compounds, whereas the reaction with ketones failed to give any significant products under the same conditions.