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:
Sep. 06, 1983
Filed:
Jun. 29, 1981
Motoo Hazama, Kyoto, JP;
Tadatoshi Aratani, Nishinomiya, JP;
Gohu Suzukamo, Ibaraki, JP;
Takeo Takahashi, Takarazuka, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A novel optically active cis-4,5-disubstituted imidazolidin-2-one derivative of the formula: ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.4 alkyl group or benzyl and R.sup.2 is a chiral aralkyl group optionally having at least one of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy and hydroxyl groups is produced asymmetrically by the reaction of 1,3-dibenzyl-cis-4,5-dicarboxy-imidazolidin-2-one or its anhydride with an optically active secondary amine of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above and is transformed into the lactone of 1,3-dibenzyl-cis-4-carboxy-5-hydroxymethyl-imidazolidin-2-one, which is a key intermediate in the synthesis of d-biotin.