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. 01, 1995
Filed:
Apr. 26, 1994
Rekha P Bansal, Santa Clara, CA (US);
Owen W Gooding, Los Gatos, CA (US);
Alexander V Muehldorf, Sunnyvale, CA (US);
Counde O-Yang, Sunnyvale, CA (US);
Syntex (U.S.A.) Inc., Palo Alto, CA (US);
Abstract
The present invention relates to a process for preparing a 5-(N-substituted)aminomethyl-1-benzocycloalkyl-1,3-dihydroimidazole-2-thio ne (wherein the N-substituent is selected from formyl, aminocarbonyl, (C.sub.1-4)alkylcarbonyl or trifluoro (C.sub.1-4)alkylcarbonyl), which process comprises reacting a benzocycloalkylamine with thiocyanic acid and dihydroxyacetone to give a corresponding 5-hydroxymethyl-1-benzocycloalkyl-1,3-dihydroimidazole-2-thione and then reacting the 5-hydroxymethyl-1-benzocycloalkyl-1,3-dihydroimidazole-2-thione with a compound of the formula H.sub.2 NC(0)R.sup.2 in which R.sup.2 is hydrogen, amino, (C.sub.1-4)alkyl or trifluoro(C.sub.1-4)alkyl or with an ammonium salt of the formula NH.sub.4.sup.+ - OC(0)R.sup.3 in which R.sup.3 is hydrogen, (C.sub.1-4)alkyl or trifluoro(C.sub.1-4)alkyl. The present invention also relates to a process for preparing 5-aminomethyl-1-benzocycloalkyl-1,3-dihydroimidazole-2-thiones, which process comprises preparing a 5-(N-substituted)aminomethyl-1-benzocycloalkyl-1,3-dihydroimidazole-2-thio ne (wherein the N-substituent is selected from formyl, (C.sub.1-4)alkylcarbonyl or trifluoro(C.sub.1-4)alkylcarbonyl) by the process described above and then hydrolyzing with acid.