The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Mar. 24, 2020
Council for Scientific & Industrial Research, New Delhi, IN;
Srihari Pabbaraja, Hyderabad, IN;
Goverdhan Mehta, Hyderabad, IN;
Ramesh Samineni, Hyderabad, IN;
Shweta Singh, Hyderabad, IN;
Council of Scientific & Industrial Research, New Delhi, IN;
Abstract
The present invention relates to carbazoles of general formula (I), and process for the preparation thereof: wherein 'R' is H, C1-C6 alkyl, benzyl, or allyl; Ris H, C1-C6 alkyl, cyclopropyl, phenyl, aryl, heteroaryl, or NO; Ris H, C1-C6 alkyl, cyclopropyl, phenyl aryl, heteroaryl, 4-methoxy phenyl, 4-ethyl phenyl, 2-methyl phenyl, or 2-Fluoro phenyl; Ris H, benzoyl, —COEt, —CHO, Br, or —OMe; Ris OH, OMOM, OMe, CN, or OTf; Ris H, or O-alkyl; and R-Ris —CHNCH2CH2-. This invention also relates to the process for the preparation of carbazomycin A of Formula (1), calothrixin B of Formula (2) and staurosporinone of Formula (3) involving carbazoles of general formula (I) as an intermediate.