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Expired
Application number
GB5358/50A
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Bayer AG
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Bayer AG
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Publication of GB670402ApublicationCriticalpatent/GB670402A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Thiosemicarbazones of cyclic aldehydes are prepared by reacting a thiosemicarbazone of a ketone with a cyclic aldehyde. In examples: (1) the thiosemicarbazone of benzaldehyde-4-carboxylic acid is obtained by dissolving acetone-thiosemicarbazone in acetic acid and heating with benzaldehyde-4-carboxylic acid in methanol; and (2) 4-acetaminobenzal-thiosemicarbazone is obtained from cyclohexanonethiosemicarbazone and 4-acetaminobenzaldehyde. Other cyclic aldehydes specified are m - nitrobenzaldehyde, p - ethylsulphone - benzaldehyde and 2 - chloro - 5 - nitrobenzaldehyde. Specification 670,401 is referred to.
GB5358/50A1949-03-041950-03-02Process of producing thiosemicarbazones of cyclic aldehydes
ExpiredGB670402A
(en)