Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 139756-04-0, name is 1-Methyl-4-(2-propoxybenzamido)-3-propyl-1H-pyrazole-5-carboxamide, A new synthetic method of this compound is introduced below., Application In Synthesis of 1-Methyl-4-(2-propoxybenzamido)-3-propyl-1H-pyrazole-5-carboxamide
(Step 1) Preparation of 4-[2-Propoxy-5-(Chlorosulfonyl)Benzamido]-1-Methyl-3-Propyl-5-Carbamoyl Pyrazole To 32.8 ml of chlorosulfonic acid cooled to 0 C., 8.48 ml of thionyl chloride and 20 g of 4-[2-propoxy benzamido]-1-methyl-3-propyl-5-carbamoyl pyrazole were successively added dropwise and portionwise, and then stirred for 2 hours at room temperature. Reaction mixture was added to ice water of 0 C. After 1 hour, the reaction mixture was extracted with ethyl acetate. The organic solution was successively washed with water and brine. The organic layer was dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to obtain a crude product and triturated with a mixture of hexane:ethyl acetate (10:1) to give 23 g of the title compound. 1H NMR(CDCl3): 0.92(t,3H), 1.08(t,3H), 1.62(m,2H), 1.97(m,2H), 2.50(t, 2H), 4.04(s,3H), 4.32(t,2H), 5.63(br s,1H), 7.24(d,1H), 7.54(br s, 1H), 8.15(dd,1H), 8.93(d,1H), 9.17(br s,1H).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.