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. 09, 1979
Filed:
Oct. 04, 1977
Shun-Ichi Yamada, Nishitsutsujigaoka, Chofu-shi, Tokyo, JP;
Shiro Terashima, Kyodo, Setagawa-ku, Tokyo, JP;
Masahiko Nagakura, Sayamadai, Sayama-shi, Saitama-ken, JP;
Munehiko Nara, Miyasaka, Setagaya-ku, Tokyo, JP;
Kowa Company, Ltd., Aichi, US;
Abstract
A novel monoester of cis-cyclopentenediol of the following formula ##STR1## wherein ##STR2## is an optically active acyl moiety. The monoester can be prepared by reacting cis-2-cyclopentene-1,4-diol with an optically active carboxylic acid of the following formula ##STR3## wherein ##STR4## is the same as defined above, or its reactive derivative, and separating the resulting reaction product into the two individual diastereomers. Lactones can be prepared from the monoesters selectively and with commercial advantage.