反应详情

温度

100 °C

(5,6,7,8-Tetrahydro-naphthalen-2-yl)-hydrazine 7b (2.0 g, 12.3 mmol) was dissolved in 50 mL of acetic acid followed by addition of ethyl acetoacetate (1.57 mL, 12.3 mmol). The reaction mixture was heated to 100° C. overnight. The mixture was concentrated under reduced pressure and the resulting residue was purified by silica gel column chromatography to obtain the title compound 5-methyl-2-(5,6,7,8-tetrahydro-naphthalen-2-yl)-2,4-dihydro-pyrazol-3-one 7c (1.58 g, yield 56.2%) as a colourless oil.

1. concentrationThe mixture was concentrated under reduced pressure
2. customthe resulting residue was purified by silica gel column chromatography