Reference of 110104-60-4, These common heterocyclic compound, 110104-60-4, name is (E)-Methyl 4-chloro-3-methoxybut-2-enoate, its 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 2 Production of 4-methoxy-2(5H) thiophenone from 4-chloro-3-methoxy-2E-butenoic acid methyl ester and sodium hydrogen sulfide 11.6 g (0.14 mol) of 90 percent sodium hydrogen sulfide monohydrate is dissolved in 90 ml of methanol. A solution of 17.0 g (0.1 mol) of 96.7 percent 4-chloro-3-methoxy-2E-butenoic acid methyl ester in 10 ml of methanol is instilled into this solution at 50 C. in 4 hours. It is stirred for another 2 hours and the methanol is then distilled off under vacuum on the rotary evaporator. The residue is mixed with 100 ml of water and extracted twice with 80 ml each of methylene chloride. The organic phase is dried over sodium sulfate and concentrated by evaporation. The residue is recrystallized hot from 15 ml of ethanol. 5.12 g of yellow-colored product with a melting point of 90 C. is obtained. Further data concerning the compound is: content (GC): 96 percent; yield: 37.8 percent.
Statistics shows that (E)-Methyl 4-chloro-3-methoxybut-2-enoate is playing an increasingly important role. we look forward to future research findings about 110104-60-4.
Reference:
Patent; Lonza Ltd.; US4906759; (1990); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics