Patents

US6559291: Process for the preparation of diazonaphthoquinonesulfonylchlorides using diphosgene and triphosgene

The invention relates to a process for the preparation of diazonaphthoquinonesulfonylchlorides of the formula 1, 2 and 3 using diphosgene or triphosgene.

Filing Date: 25-03-2002

Issue Date: 06-05-2003

Applicant: CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad

Patent No: US6559291

Application No: 10/105962

Inventor(s): Vummadi Venkat Reddy; Maruthi Janaki Ram Reddy; Vaidya Jayathirtha Rao

IPC Classification: C07C303/02

Country: United States of America

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