Invention Patent
AT134628T
未知
- Patent Title:
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Application No.: AT92120259Application Date: 1992-11-27
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Publication No.: AT134628TPublication Date: 1996-03-15
- Inventor: HENKELMANN JOCHEM DR , RUEHL THOMAS DR , ZIMMERMANN HORST DR , GOETZ NORBERT DR , SPIEGLER WOLFGANG DR , KUEKENHOEHNEN THOMAS DR
- Applicant: BASF AG
- Assignee: BASF AG
- Current Assignee: BASF AG
- Priority: DE4141222 1991-12-13
- Main IPC: B01J23/62
- IPC: B01J23/62 ; B01J23/656 ; B01J23/72 ; B01J23/86 ; B01J23/88 ; C07B61/00 ; C07D309/06
Abstract:
Method for the preparation of 4-hydroxymethyltetrahydropyrans of the general formula I in which R , R , R and R denote hydrogen, C1- to C12-alkyl, C3- to C8-cycloalkyl, aryl or C7- to C20-aralkyl, by reacting tetrahydropyrancarboxylic esters of the general formula II in which R1, R2, R3 and R4 have the abovementioned meanings and R5 denotes hydrogen or C1- to C12-alkyl, at temperatures of 50 to 400 DEG C and pressures of 1 to 400 bar in the presence of hydrogen and hydrogenation catalysts.
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