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:
Jun. 27, 1989
Filed:
Apr. 26, 1988
Taiiti Okada, Kyoto, JP;
Yasuaki Abe, Takarazuka, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Abstract
A method for producing a compound of the formula: ##STR1## [wherein R.sup.1 and R.sup.2 each stand for a lower alkyl group; n denotes an integer of 0 to 21; X stands for hydrogen atom or an optionally protected hydroxyl group; and Y stands for an optionally protected hydroxyl group], which comprises reducing an ester compound of the formula: ##STR2## [wherein R.sup.1, R.sup.2, n, X and Y are of the same meaning as defined above, and R.sup.3 stands for a lower alkyl group ] with a mixture of sodium borohydride and aluminum chloride. This method give the desired compound in a high yield, and is advantageous from the industrial point of view.