Synthesis of sulphonated 4H-1, 4-benzothiazines

RR Gupta, R Kumar, RK Gautam

Index: Gupta, Radha Raman; Kumar, Rakesh Heterocycles, 1984 , vol. 22, # 1 p. 87 - 91

Full Text: HTML

Citation Number: 1

Abstract

Abstract Single step and convenient synthesis for 6-sulphonated 4H-1, 4-benzothiazines is reported by the condensation and oxidative cyclization of 2-aminobenzenethiol-4-sulphonic acid with β-diketones. 2-Aminobenzenethiol-4-sulphonic acid has been synthesized directly

 Related Synthetic Route
2-amino-3-ethoxy-benzenethiol Structure

91074-49-6

2-amino-3-ethox...

1-Phenylbutane-1,3-dione Structure

93-91-4

1-Phenylbutane-...

~55%

(5-ethoxy-8-methyl-10-thia-7-azabicyclo[4.4.0]deca-1,3,5,8-tetraen-9-yl)-phenyl-methanone Structure

89808-03-7

(5-ethoxy-8-met...

4-ethoxy-1,3-benzothiazol-2-amine Structure

15850-79-0

4-ethoxy-1,3-be...

~%

(5-ethoxy-8-methyl-10-thia-7-azabicyclo[4.4.0]deca-1,3,5,8-tetraen-9-yl)-phenyl-methanone Structure

89808-03-7

(5-ethoxy-8-met...

Thiourea,N-(2-ethoxyphenyl)- Structure

1516-38-7

Thiourea,N-(2-e...

~%

(5-ethoxy-8-methyl-10-thia-7-azabicyclo[4.4.0]deca-1,3,5,8-tetraen-9-yl)-phenyl-methanone Structure

89808-03-7

(5-ethoxy-8-met...

O-PHENETIDINE HYDROCHLORIDE Structure

89808-01-5

O-PHENETIDINE H...

~%

(5-ethoxy-8-methyl-10-thia-7-azabicyclo[4.4.0]deca-1,3,5,8-tetraen-9-yl)-phenyl-methanone Structure

89808-03-7

(5-ethoxy-8-met...

2-amino-3-ethoxy-benzenethiol Structure

91074-49-6

2-amino-3-ethox...

2,4-Pentandione Structure

123-54-6

2,4-Pentandione

~44%

1-(5-ethoxy-3-methyl-4H-1,4-benzothiazin-2-yl)ethanone Structure

89808-05-9

1-(5-ethoxy-3-m...

4-ethoxy-1,3-benzothiazol-2-amine Structure

15850-79-0

4-ethoxy-1,3-be...

~%

1-(5-ethoxy-3-methyl-4H-1,4-benzothiazin-2-yl)ethanone Structure

89808-05-9

1-(5-ethoxy-3-m...

Thiourea,N-(2-ethoxyphenyl)- Structure

1516-38-7

Thiourea,N-(2-e...

~%

1-(5-ethoxy-3-methyl-4H-1,4-benzothiazin-2-yl)ethanone Structure

89808-05-9

1-(5-ethoxy-3-m...

O-PHENETIDINE HYDROCHLORIDE Structure

89808-01-5

O-PHENETIDINE H...

~%

1-(5-ethoxy-3-methyl-4H-1,4-benzothiazin-2-yl)ethanone Structure

89808-05-9

1-(5-ethoxy-3-m...

2-amino-3-ethoxy-benzenethiol Structure

91074-49-6

2-amino-3-ethox...

1,3-Diphenylpropane-1,3-dione Structure

120-46-7

1,3-Diphenylpro...

~50%

(5-ethoxy-3-phenyl-4H-1,4-benzothiazin-2-yl)-phenylmethanone Structure

89808-06-0

(5-ethoxy-3-phe...

4-ethoxy-1,3-benzothiazol-2-amine Structure

15850-79-0

4-ethoxy-1,3-be...

~%

(5-ethoxy-3-phenyl-4H-1,4-benzothiazin-2-yl)-phenylmethanone Structure

89808-06-0

(5-ethoxy-3-phe...

Thiourea,N-(2-ethoxyphenyl)- Structure

1516-38-7

Thiourea,N-(2-e...

~%

(5-ethoxy-3-phenyl-4H-1,4-benzothiazin-2-yl)-phenylmethanone Structure

89808-06-0

(5-ethoxy-3-phe...

O-PHENETIDINE HYDROCHLORIDE Structure

89808-01-5

O-PHENETIDINE H...

~%

(5-ethoxy-3-phenyl-4H-1,4-benzothiazin-2-yl)-phenylmethanone Structure

89808-06-0

(5-ethoxy-3-phe...

4-ethoxy-1,3-benzothiazol-2-amine Structure

15850-79-0

4-ethoxy-1,3-be...

~%

ethyl 5-ethoxy-3-methyl-4H-1,4-benzothiazine-2-carboxylate Structure

89808-07-1

ethyl 5-ethoxy-...

Thiourea,N-(2-ethoxyphenyl)- Structure

1516-38-7

Thiourea,N-(2-e...

~%

ethyl 5-ethoxy-3-methyl-4H-1,4-benzothiazine-2-carboxylate Structure

89808-07-1

ethyl 5-ethoxy-...

O-PHENETIDINE HYDROCHLORIDE Structure

89808-01-5

O-PHENETIDINE H...

~%

ethyl 5-ethoxy-3-methyl-4H-1,4-benzothiazine-2-carboxylate Structure

89808-07-1

ethyl 5-ethoxy-...

Ethyl acetoacetate Structure

141-97-9

Ethyl acetoacetate

2-amino-3-ethoxy-benzenethiol Structure

91074-49-6

2-amino-3-ethox...

~41%

ethyl 5-ethoxy-3-methyl-4H-1,4-benzothiazine-2-carboxylate Structure

89808-07-1

ethyl 5-ethoxy-...


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