Title:
MANUFACTURE OF 3-FORMYL-TETRAHYDROTHIOPYRANE
Document Type and Number:
Japanese Patent JPS6081180
Kind Code:
A
Abstract:
3-Formyltetrahydrothiopyrans are prepared by hydrogenating a 3-formyl-5,6-dihydro-2H-thiopyran in the presence of a catalyst containing nickel, cobalt, platinum, copper and/or silver; if necessary, the 3-formyl-5,6-dihydro-2H-thiopyrans are prepared by converting bis-( beta -formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans in the presence of an acidic catalyst, and, if required, these bis-( beta -formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans are prepared by reacting an acrolein with hydrogen sulfide (a) in the presence of a basic catalyst and of methylene chloride, aromatic hydrocarbons and/or 1,1,2-trichloroethane as solvents, and/or (b) in the presence of a carboxamide. The compounds obtainable by the process according to the invention are useful starting materials for the preparation of dyes, drugs and pesticides.
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Inventors:
NORUBERUTO GEETSU
DEIITAA YAAN
GERUNOOTO RAISENUEEBAA
HAINTSU ETSUKUHARUTO
DEIITAA YAAN
GERUNOOTO RAISENUEEBAA
HAINTSU ETSUKUHARUTO
Application Number:
JP18826784A
Publication Date:
May 09, 1985
Filing Date:
September 10, 1984
Export Citation:
Assignee:
BASF AG
International Classes:
B01J23/00; B01J23/40; B01J23/50; C07B61/00; C07D335/02; (IPC1-7): B01J23/40; B01J23/50; C07D335/02
Attorney, Agent or Firm:
Toshio Yano (2 outside)