37.
    发明专利
    未知

    公开(公告)号:ES2094047T3

    公开(公告)日:1997-01-01

    申请号:ES94903867

    申请日:1993-12-23

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP93/03670 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Dec. 23, 1993 PCT Pub. No. WO94/15931 PCT Pub. Date Jul. 21, 1994A process for preparing tetrahydropyran-4-carboxylic acid and its esters of the formula I (I) (R=H, C1-C8-alkyl, C3-C8-cycloalkyl, aryl, C7-C12-alkylphenyl and C7-C12-phenylalkyl) by reacting 2,7-dioxaspiro[4.4]nonane-1,6-dione IIIII),in the presence of acidic catalysts at from 150 DEG to 350 DEG C. and from 0.01 to 100 bar.

Patent Agency Ranking