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.
Process for the preparation of 9-deazaguanine derivatives
申请人:BioCryst Pharmaceuticals, Inc.
公开号:US20040254181A1
公开(公告)日:2004-12-16
Derivatives of 9-deazaguanine are prepared by reacting an aldehyde or ketone with a dialkylaminomalonate to form the corresponding enamine. The enamine is then reacted with a base to form a cyclic pyrrole. The cyclic pyrrole is reacted with an urea compound or a derivative of carbamimidoic acid to provide a protected guanidino compound. The guanidino is converted to the desired 9-deazaguanine derivative by reacting with trifluoracetic acid or with an alkoxide or hydroxide followed by neutralization with an acid.