公开(公告)号：HUT63402A

公开(公告)日：1993-08-30

申请号：HU9203947

申请日：1992-12-11

Applicant: BASF AG

Inventor： HENKELMANN JOCHEM ,  RUEHL THOMAS ,  ZIMMERMANN HORST ,  GOETZ NORBERT ,  SPIEGLER WOLFGANG ,  KUEKENHOEHNER THOMAS

IPC: B01J23/656 ,  B01J23/62 ,  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.