HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hydrochloric Acid → 3-(N-carbethoxymethyl-N-methylsulfamoyl)-thiophene-2-carboxylic acid methyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Water | HCID 962 | — |
| Reactant | Glycine, N-methyl-, ethyl ester | HCID 95849 | — |
| Reactant | 2-Thiophenecarboxylic acid, 3-(chlorosulfonyl)-, methyl ester | HCID 2736733 | — |
| Solvent | Chloroform | HCID 6212 | — |
| Product | 3-(N-carbethoxymethyl-N-methylsulfamoyl)-thiophene-2-carboxylic acid methyl ester | HCID 2808794 | — |
Reaction Steps
20 G. of 3-chlorosulfonylthiophene-2-carboxylic acid methyl ester are dissolved in absolute chloroform, whereupon 21 g. of sarcosine ethyl ester are added dropwise during 10 minutes. In so doing, the mixture warms up to 50° C. After 20 minutes, the mixture is cooled, shaken once each time with water, 0.5-N hydrochloric acid and a sodium bicarbonate solution, dried and evaporated. The remaining oil is brought to crystallization with ethanol. There is obtained 3-(N-carbethoxymethyl-N-methyl-sulfamoyl)-thiophene-2-carboxylic acid methyl ester of melting point 84°-85° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04134898 |
| Source dataset | uspto-grants-1979_01 |
| ORD ID | ord-fbbc203ec61c493c944e867351d9aa8e |
| Source note | uspto-grants-1979_01 |