• Journal of the Korean Chemical Society
• /
• v.35 no.2
• /
• pp.179-183
• /
• 1991

• Bulletin of the Korean Chemical Society
• /
• v.23 no.12
• /
• pp.1715-1718
• /
• 2002

Treatment of ethyl 5-hydroxy-3,4-diphenylthieno[2,3-c]pyridazine-6-carboxylate (1a) with hydrazine hydrate in ethanol gave the carbohydrazide 2,. Some derivatives of the latter compound have been synthesized. Also, 6-acetyl-3,4-diphenyl-5-hydroxythieno[2.3-c]pyridazine (1b) was subjected to some reactions to produce other new thienopyridazine derivatives.

• Bulletin of the Korean Chemical Society
• /
• v.12 no.6
• /
• pp.709-709
• /
• 1991

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2019.05a
• /
• pp.420-421
• /
• 2019

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2018.11a
• /
• pp.422-423
• /
• 2018

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2018.11a
• /
• pp.355-356
• /
• 2018

• Bulletin of the Korean Chemical Society
• /
• v.10 no.3
• /
• pp.315-316
• /
• 1989

• Bulletin of the Korean Chemical Society
• /
• v.6 no.5
• /
• pp.320-320
• /
• 1985

• Journal of the Korean Chemical Society
• /
• v.17 no.1
• /
• pp.25-30
• /
• 1973

2,6-Disubstituted-3-pyridazinones were synthesized by the reactions of $\gamma$,$\gamma$,$\gamma$-trichloroethylidene-m-nitroacetophenone with phenylhydrazine and substituted phenylhydrazines, and hydrazone was isolated as an intermediate from the reaction with 2, 4-dinitrophenylhydrazine. From the reaction with hydrazine hydrate 3-(m-nitrophenyl)-5-trichloromethyl-2-pyrazoline was obtained in good yield. The effect of substituents on phenyl group in the reaction of $\gamma$,$\gamma$,$\gamma$-trichloroethylidene-m-nitroacetophenone with substituted phenylhydrazines was also discussed.

• Journal of the Korean Chemical Society
• /
• v.19 no.5
• /
• pp.339-342
• /
• 1975

The rates of consumption of iodine and gas evolution in hydrazine-iodine reaction in the presence of large excess of hydrazine have been studied in the pH range 0.5${\sim}$7. They are the same at very low pH and both increase to respective asymptotic values as pH is increased. The rate of iodine consumption is three orders of magnitude faster than the rate of gas evolution at higher pH. The results are explained by postulating that $N_2H_4$ but not protonated form reacts with iodine and an intermediate, probably $N_2H_2I_2$, is formed which decomposed by first order reaction of rate constant about 1.5${\times}10^{-3}sec^{-1}$ in neutral and weakly acidic solutions.