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:
Sep. 14, 2004
Filed:
Aug. 06, 2002
Shouichi Hiraga, Okazaki, JP;
Masashi Kawasaki, Okazaki, JP;
Atsushi Akao, Okazaki, JP;
Asayuki Kamatani, Okazaki, JP;
Masayuki Hagiwara, Okazaki, JP;
Toshiaki Mase, Okazaki, JP;
Fumio Nakano, Okazaki, JP;
Banyu Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
A process for preparing indolopyrrolocarbazole derivatives [I] by trating a compound [V] with a base in an inert solvent to prepare a compound [IV], reacting the compound [IV] with a compound [III]to prepare a compound [II], and deblocking the compound [II]; intermediates [II], [III] and [IV]; and a process for preparing compounds [III]: [wherein Y is hydrogen, C alkyl, phenyl, benzyloxymethyl, or aralkyl; R , R , R , R , R , and R are each independently a hydroxyl-protecting group; R and R are each independently hydrogen or a hydroxyl-protecting group; and X is an acid molecule]. The above process is a safe and easy industrial process for preparing indolopyrrolocarbazole derivatives [1] useful as antitumor agents.