3-ethyl-4-methyl-pyrrole-2,5-dione synthesis

10synthesis methods

Product Name:3-ethyl-4-methyl-pyrrole-2,5-dione
CAS Number:20189-42-8
Molecular formula:C7H9NO2
Molecular Weight:139.15

3552-33-8
13 suppliers
$1455.00/250mg

20189-42-8
26 suppliers
inquiry

Yield:-

Reaction Conditions:

with urea at 140; for 3.6 h;Temperature;Concentration;

Steps:

1.C C, Preparation of 2-methyl-3-ethylmaleamide
According to the weight ratio of 2-methyl-3-ethyl maleic anhydride to urea of 1: 1.8,2-methyl-3-ethyl-maleic anhydride obtained in step B was stirred and mixed with urea uniformly,Reheated to a temperature of 140 ° C,And the reaction at this temperature 3.6h,Then use air cooling medium for cooling,Then sublimation temperature 140 ~ 160 ° sublimation,crystallization,The white needles 2-methyl-3-ethylmaleimide was obtained.The result of the NMR measurement of the product is shown in FIG. 3.

References:

Yancheng Chunzhu Flavors Co., Ltd.;Kang Minge;Wang Guan;Xu Hongwei CN106748956, 2017, A Location in patent:Page/Page column 0080-0081; 0092-093; 0104-105; 0116-0117; 0128

Butanedioic acid, 2-acetyl-3-methyl-, 1,4-dimethyl ester

35493-66-4
0 suppliers
inquiry

20189-42-8
26 suppliers
inquiry

References

Ethanamine, N-[(3,5-dichlorophenyl)methylene]-2,2-diethoxy-

1000210-73-0
0 suppliers
inquiry

20189-42-8
26 suppliers
inquiry

References

1000210-73-0
0 suppliers
inquiry

20189-42-8
26 suppliers
inquiry

References

1000210-73-0
0 suppliers
inquiry

20189-42-8
26 suppliers
inquiry

References