- Single Pot Process For The Preparation Of Diazonaphthoquinonesulfonyl Ester
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The present invention provides a single pot process for the preparation of diazonaphthoquinonesulfonyl ester, a useful organic material for micro electronic and dye industry. This study pertains to the one pot preparation of diazonaphthoquinonesulfonyl esters using the corresponding diazonaphthoquinine sulfonic acid or its sodium salt, diphosgene or triphosgene, variety of hydroxy compounds and tertiary organic base in an organic solvent medium.
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Page/Page column 2; 4
(2008/06/13)
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- A SINGLE POT PROCESS FOR THE PREPARATION OF DIAZONAPHTHOQUINONESULFONYL ESTER
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The present invention provides a single pot process for the preparation of diazonaphthoquinonesulfonyl ester, a useful organic material for micro electronic and dye industry. This study pertains to the one pot preparation of diazonaphthoquinonesulfonyl esters using the corresponding diazonaphthoquinine sulfonic acid or its sodium salt, diphosgene or triphosgene, variety of hydroxy compounds and tertiary organic base in an organic solvent medium
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Page/Page column 5-6; 9-11
(2008/06/13)
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- A process for the preparation of diazonaphthoquinonesulfonylchlorides using diphosgene and triphosgene
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The invention relates to a a process for the preparation of diazonaphthoquinonesulfonylchlorides using diphosgene and triphosgene of the formula 1a, 1b, 1c using diphosgene or triphosgene.
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Page/Page column 4-5
(2008/06/13)
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- Method for producing 1,2-naphthoquinone-2-diazide-4-sulfonyl chloride
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An effective method for producing 1,2-naphthoquinone-2-diazide-4-sulfonyl chloride at high yield, wherein formation of impurities is prevented. The method includes the following steps: 1,2-naphthoquinone-2-diazide is reacted with chlorosulfuric acid, to thereby produce a mixture of a sulfonated compound and a chlorosulfonated compound of the diazide; and to the mixture, at least one substance selected from among thionyl chloride and phosphorus pentachloride is added for further reaction, to thereby obtain 1,2-naphthoquinone-2-diazide-4-sulfonyl chloride.
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- Sulfochlorination of 1,2-Naphthoquinone-(2)-diazide by Chlorosulfonic acid
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The sulfochlorination of 1,2-naphthoquinone diazide-(2) (1) by chlorosulfonic acid was investigated.The yields of the formed products (1,2-naphthoquinone diazide-(2)-4-sulfonic acid (4), 1,2-naphthoquinone diazide-(2)-5-sulfonic acid (5), 1,2-naphthoquinone diazide-(2)-4-sulfochloride (2) and 1,2-naphthoquinone diazide-(2)-5-sulfochloride (3)) depend on the temperature and on the time of reaction.The highest yields of the favoured 1,2-naphthoquinone diazide-(2)-4-sulfochloride (2) are obtained at 63 deg C and after a reaction time of 80 minutes (50percent).
- Sauer, E.,Polz, K.,Schopf, G.,Bendig, J.
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p. 467 - 473
(2007/10/02)
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