Process for the preparation of substituted dibenzoylmethane compounds
申请人:BASF Aktiengesellschaft
公开号:US06278025B1
公开(公告)日:2001-08-21
The invention relates to a process for the preparation of substituted dibenzoylmethane compounds of the formula I,
which comprises
a1) condensing benzaldehydes of the formula II with acetophenones of the formula III to give the chalkones of the formula IV
or
a2) condensing benzaldehydes of the formula V with acetophenones of the formula VI to give the chalkones of the formula VII
b) converting the chalcones of the formulae IV and VII into the dibenzoylmethane compounds of the formula I, the substituents R1 and R2 being defined as in the description.