Process for preparing substituted acetals of malondialdehyde
申请人:Creanova, Inc.
公开号:US06395920B1
公开(公告)日:2002-05-28
A process directed to the preparation of 2-substituted and 2,2-disubstituted acetals of malondialdehyde from ortho formates and substituted vinyl ethers in the presence of an acidic catalyst.
一种从邻甲酸酯和取代乙烯醚在酸性催化剂存在下制备丙二醛的2-取代和2,2-二取代缩醛的过程。
PROCESS FOR PREPARING SUBSTITUTED ACETALS OF MALONDIALDEHYDE
申请人:——
公开号:US20020040166A1
公开(公告)日:2002-04-04
A process directed to the preparation of 2-substituted and 2,2-disubstituted acetals of malondialdehyde from ortho formates and substituted vinyl ethers in the presence of an acidic catalyst.
Process for preparing 4-amino-5-dialkoxymethylpyrimidine derivatives
申请人:UBE INDUSTRIES, LTD.
公开号:EP0103126A1
公开(公告)日:1984-03-21
There are disclosed a process for preparing a 4-amino-5-dialkoxymethylpyrimidine derivative of the formula:
which comprises subjecting a propanenitrile derivative represented by the formula (I) or (II)
to reaction with an amidine of the formula
wherein all the R1 to R6 are as defined in the specification; and a novel starting compound of the above formula (II) useful for the process.