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3-Furanpropanoyl chloride, 2,5-dihydro-4-methyl-2,5-dioxo- synthesis

10synthesis methods
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Yield:160239-81-6 97%

Reaction Conditions:

with oxalyl dichloride;N,N-dimethyl-formamide in dichloromethane at 25; for 1 h;

Steps:

1

CDM (1.840 g, 0.010 mol) was completely dissolved in anhydrous dichloromethane (20 mE) at 0° C., N,N-dimethylformamide (50 jt) and oxalyl dichloride (3.8 10 g, 0.030 mol) were successively added. After kept for 10 mm, reaction was continued at 25° C. for 1 h. Dichloromethane was removed with a rotary evaporator, and N,N-dimethylformamide was removed by distillation under 15.0 Pa to obtain an intermediate, acyl-chlorinated CDM (1.96 g, with a yield of 97%).

References:

US2019/60463,2019,A1 Location in patent:Paragraph 0170