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:
Oct. 07, 2014
Filed:
May. 12, 2010
Yoshimasa Fukuda, Yokohama, JP;
Takashi Ando, Yokohama, JP;
Kimihiko Goto, Yokohama, JP;
Nozomu Nakanishi, Yokohama, JP;
Takashi Watanabe, Yokohama, JP;
Kenichi Kurihara, Matsuyama, JP;
Nobuto Minowa, Yokohama, JP;
Masaaki Mitomi, Yokosuka, JP;
Yoshimasa Fukuda, Yokohama, JP;
Takashi Ando, Yokohama, JP;
Kimihiko Goto, Yokohama, JP;
Nozomu Nakanishi, Yokohama, JP;
Takashi Watanabe, Yokohama, JP;
Kenichi Kurihara, Matsuyama, JP;
Nobuto Minowa, Yokohama, JP;
Masaaki Mitomi, Yokosuka, JP;
Meiji Seika Pharma Co., Ltd., Tokyo-To, JP;
Abstract
Disclosed is a process for efficiently producing pyripyropene derivatives having acyloxy at the 1-position and 11-position and hydroxyl at the 7-position. The process comprises selectively acylating hydroxyl at the 1-position and 11-position of a compound represented by formula B1 through one to three steps with an acylating agent in the presence or absence of a base.