Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5266/45A
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GEN PRINTING INK CORP
Original Assignee
GEN PRINTING INK CORP
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Publication date
Application filed by GEN PRINTING INK CORPfiledCriticalGEN PRINTING INK CORP
Publication of GB611716ApublicationCriticalpatent/GB611716A/en
Sulphonamides are prepared by reacting a substituted aniline as herein defined, free from sulphonic groups and unsubstituted in the amino group, with chlorosulphonic acid and reacting the mono-sulphonyl chloride so produced with ammonia. The expression "substituted anilines" includes not only such compounds as the nitroanilines and the amino di-aryls, but also condensed cyclic compounds such as naphthylamine. In examples: (1) 2-aminodiphenyl is added to chlorosulphonic acid at 25-70 DEG C., heated to 90 DEG C., cooled and added to concentrated ammonia to give 2-aminodiphenyl-41-sulphonamide; (2) 4-aminodiphenyl is added to chlorosulphonic acid and the product reacted with concentrated ammonia to give 4-aminodiphenyl-41-sulphonamide; (3) m-nitroaniline is added to chlorosulphonic acid and the product reacted with concentrated ammonia to give m-nitroaniline-sulphonamide; and (4) a -naphthylamine is added to chlorosulphonic acid and the product reacted with concentrated ammonia to give a -naphthylamine-sulphonamide.
GB5266/45A1944-03-111945-03-02Improvements in or relating to sulphonamides and preparation thereof
ExpiredGB611716A
(en)
Improvements in the manufacture and production of valuable water-soluble condensation products suitable as assistants in the textile and related industries