Process for production of 5-arylpentanols

  • US 6,600,079 B2
  • Filed: 09/26/2002
  • Issued: 07/29/2003
  • Est. Priority Date: 09/27/2001
  • Status: Active Grant
First Claim
Patent Images

1. A process for producing a 5-arylpentanol of formula (2):

  • embedded imagewherein,R1 represents an aryl group which may be substituted with one or two or more of an alkyl or alkoxy group and has 6 to 12 carbon atoms in total, R3 represents a hydrogen atom, or an alkyl or alkenyl group of 1 to 6 carbon atoms, and R4 represents R2 defined below when R2 is a monovalent group or represents R2H when R2 is a divalent group, which comprises effecting hydrogenolysis of a pyran compound of formula (1);

    embedded imagewherein,R1 and R3 are as defined above, R2 represents a hydrogen atom, an alkyl or alkenyl group of 1 to 6 carbon atoms, or an alkylidene or alkenylidene group of 1 to 6 carbon atoms, and a dotted line represents a possible bond and any one of the three bonds represented by dotted lines and solid lines is a double bond, in the presence of one or more catalysts selected from (a) a catalyst carrying two or more elements selected from noble metals in Group VIII in the periodic table and (b) an acid type palladium-supporting catalyst.

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