Water → 5H-Cyclopenta(d)pyrazolo(1,5-a)pyrimidin-8-amine, 3-(2-chloro-4-methoxyphenyl)-N-(1-ethylpropyl)-6,7-dihydro-2-methyl-

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Under argon gas atmosphere, a mixture of a solution of the compound prepared in Example 5 (177.6 g) in N,N-dimethylacetamide (355 mL) and a solution of triethylamine (103.2 g) and 3-aminopentane (88.9 g) in isopropyl alcohol (178 mL) was stirred for 4 hours at 95 to 105° C. of internal temperature. Water was poured into the reaction solution that was cooled to 70 to 80° C. of internal temperature. The diluted solution was cooled to 50 to 60° C. of internal temperature, and then after the crystal was precipitated, the solution was stirred for 30 minutes. Furthermore, water was poured into the solution, and the diluted solution was stirred for 1 hour at 20 to 30° C. of internal temperature. The precipitated crystal was collected by filtration, and the obtained crystal was dried under reduced pressure for 14 hours or more at about 50° C. to give the crude crystal of the title compound (174 g, (97.4 area %), quantitative value: 85% (two process)).

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