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:
Aug. 05, 1986
Filed:
Jan. 04, 1985
Genichi Tsuchihashi, Tama, JP;
Keisuke Suzuki, Chigasaki, JP;
Toyo Stauffer Chemical Co., Ltd., Tokyo, JP;
Abstract
A method of preparing optically active ketones having the general formula ##STR1## wherein R.sup.2 and R.sup.3 indicate hydrocarbon groups having 1 to 20 carbon atoms characterized by submitting an optically active sulfonyloxy alcohol having the general formula ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 indicate hydrocarbon groups having carbon atoms of 1 to 20 and which optionally contain N, O, P and S. The symbol * indicates asymmetric carbon atoms to rearrangement in a solvent and in the presence of organoaluminum compounds given by the general formula R.sub.3-n.sup.4 AlX.sub.n, (wherein R.sup.4 indicates an alkyl group having carbon atoms of 1 to 20 and X indicates a halogen atom, an alkoxy group or a CN group. n is 1, 1.5 or 2).