Reference of 943541-20-6,Some common heterocyclic compound, 943541-20-6, name is 3-Chloro-6-(1-methyl-1H-pyrazol-4-yl)pyridazine, molecular formula is C8H7ClN4, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
Example 13: A route to prepare compound (I)6-{difluoror6-(1-methvl-1 H-pvrazol-4-vl)? ,2,41triazolor4,3-lpvridazin-3-vnmethvl>quinolineStep 1 : tert-butyl 2-f6-(1-methyl-1 H-pyrazol-4-yl)pyridazin-3-vnhvdrazinecarboxylatetert-butyl carbazate, 8,98g (67,3 mmol) and 3-chloro-6-(1-methyl-1 /-/-pyrazol-4- yl)pyridazine (11 ,9 g, 61 ,1 mmol) were mixed in 1-butanol (245 ml_). This mixture was heated till 900C and stirred at that temperature for 16h. The reaction mixture was cooled and water (250 ml_) and ethylacetate (250 mL) were added. The biphasic mixture was neutralised with sodium hydrogencarbonate till the pH is 7. Then the organic layer was separated and the water layer was extracted with ethylacetate (250 mL). The combined organic layers were washed once with water (250 mL) and evaporated. The residue was stirred in isopropylether, filtered off and dried under vacuum. Yield: 5,9 g (20,3 mmol; 33%) of the title compound.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Chloro-6-(1-methyl-1H-pyrazol-4-yl)pyridazine, its application will become more common.