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. 21, 1980
Filed:
Feb. 27, 1979
Wakunaga Yakuhin Kabushiki Kaisha, Osaka, JP;
Abstract
A process for producing hydro-precursors for vitamin K.sub.1 and vitamin K.sub.2 which comprises reacting (A) 2-methylhydronaphthoquinone-1,4 with (B) a compound selected from the group consisting of phytyl bromide, isophytyl bromide, geranyl bromide, farnesyl bromide, geranylgeranyl bromide and the corresponding chlorides in a reaction system which comprises an aqueous phase comprising an aqueous solution of an alkali and an oily phase comprising a hydrophobic organic solvent, in the presence of a salt comprising a quaternary ammonium ion or a tetraalkyl phosphonium ion represented by the formula (I) or formula (II): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an alkyl or aralkyl group containing from 1 to 20 carbon atoms and the sum of the carbons in R.sub.1, R.sub.2, R.sub.3 and R.sub.4 groups is at least 12. The resultant hydro-precursor is oxidized to convert it into vitamin K.sub.1 or vitamin K.sub.2.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile