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:
Mar. 14, 1989
Filed:
Jul. 14, 1987
Kanji Meguro, Nishinomiya, JP;
Takeshi Fujita, Takarazuka, JP;
Chitoshi Hatanaka, Nagaokakyo, JP;
Satoru Ooi, Suita, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Abstract
A compound of the formula: ##STR1## (wherein R.sup.1 is hydrogen or a lower alkyl) can be produced advantageously by (1) reacting a compound of the formula: ##STR2## (wherein R.sup.1 has a meaning given above) with a halogenating agent or sulfonyl halide to give a compound of the formula: ##STR3## (wherein R.sup.1 has a meaning given above and X is a halogen or an alkyl- or aryl-sulfonyloxy), (2) reacting the resulting compound with a compound of the formula: ##STR4## to give a compound of the formula: (wherein R.sup.1 has the meaning given above), (3) reacting the resulting compound with a compound of the formula: ##STR5## to give a compound of the formula: ##STR6## (wherein R.sup.1 has the meaning given above), and (4) subjecting the resulting compound to catalytic reduction.