CHROMANYL ESTERS USEFUL FOR THE PREPARATION OF TOCOPHENOL

    公开(公告)号:CA1334852C

    公开(公告)日:1995-03-21

    申请号:CA587810

    申请日:1989-01-09

    Applicant: BASF AG

    Abstract: Disclosed are new chromanyl ester of (a) the formula (IV) (IV) (b) the formula (IV') (IV') and (c) the formula (I''') (I''') either as a mixture of two diastereomers or as a pure diastereomer thereof, wherein the group is optically active residue, R1, R2, R3 and R4 are, independently, each hydrogen or C1-C4-alkyl, R' is C1-C4-alkyl, R5 is C1-C4 alkyl and Ar is phenyl or naphthyl unsubstituted or substituted by more than two substituents selected amongst C1-C4-alkyl, C1-C4-alkoxy, chlorine, bromine, cyano and nitro. These compounds are intermediates for use in preparing tocopherol.

    24.
    发明专利
    未知

    公开(公告)号:DK433689A

    公开(公告)日:1990-03-03

    申请号:DK433689

    申请日:1989-09-01

    Applicant: BASF AG

    Abstract: In an improved process for the preparation of 2-n-propyl-4-amino-5-methoxymethyl-pyrimidine of the formula I I by reacting butyramidine II II with alpha -methoxymethyl- beta -methoxyacrylonitrile III III the butyramidine II is reacted with a 0.4-5 molar excess of alpha -methoxymethyl- beta -methoxyacrylonitrile III at from -10 DEG to +20 DEG C.

Patent Agency Ranking