Process for producing N,N-disubstituted p-phenylenediamine derivative sulfate
AssigneeWako Pure Chemical Industries, Ltd.
InventorsTakehiko Iritani, Ryohiko Kinoshita, Yoshiki Kametani
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Abstract
4-Amino-3-methyl-N-ethyl-N-(.beta.-hydroxyethyl)-aniline sulfate which is used particularly as a developer for color photography can be easily produced in high yield and high quality by nitrosating N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine by use of an alkyl nitrite in a homogeneous alcohol solution containing sulfuric acid in an amount of about 0.5 to about 1 mole per mole of N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine, and then reducing the nitrosation product in an aqueous alcohol solution after or without isolation of the nitrosation product.
Claims10
A process for producing 4-amino-3-methyl-N-ethyl-N-(.beta.-hydroxyethyl)aniline sulfate which comprises nitrosating N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine with an alkyl nitrite in an aqueous alcohol solution containing 30-90% by volume of the alcohol and about 0.5 to about 1 mole of sulfuric acid per mole of the N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine to form N-ethyl-N-(.beta.-hydroxyethyl)-3-methyl-4-nitrosoaniline sulfate, and catalytically hydrogenating the N-ethyl-N-(.beta.-hydroxyethyl)-3-methyl-4-nitrosoaniline sulfate.
Dependencies are inferred from the claim text.