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18162-48-6872-50-4Methylene ChloridenaphthaleneTHFTitanium Dioxide

3-Amino-4-(4-chlorobenzenesulphonyl)thiophene-2-carboxylic acid synthesis

2synthesis methods
32083-27-5 Synthesis
2-((4-CHLOROPHENYL)SULFONYL)-3-ETHOXYPROP-2-ENENITRILE

32083-27-5
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3-Amino-4-(4-chlorobenzenesulphonyl)thiophene-2-carboxylic acid

175201-47-5
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Yield:-

Steps:

Multi-step reaction with 2 steps
1: 63 percent / Et3N / tetrahydrofuran / 2 h / 75 - 80 °C
2: 97 percent / 5N aq. NaOH / dioxane / 100 °C

References:

Stephens, Chad E.;Price, Matthew B.;Sowell Sr., J. Walter [Journal of Heterocyclic Chemistry,1999,vol. 36,# 3,p. 659 - 665]

175137-53-8 Synthesis
METHYL 3-AMINO-4-[(4-CHLOROPHENYL)SULFONYL]THIOPHENE-2-CARBOXYLATE

175137-53-8
7 suppliers
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3-Amino-4-(4-chlorobenzenesulphonyl)thiophene-2-carboxylic acid

175201-47-5
6 suppliers
inquiry

References