Pyrimidine derivatives and processes for the preparation thereof
申请人:Novartis AG
公开号:US06251911B1
公开(公告)日:2001-06-26
4-Amino-1H-pyrazolo[3,4-d]pyrimidine derivatives of formula I
wherein the substituents are as defined in claim 1, are described.
These compounds inhibit the tyrosine kinase activity of the receptor for epidermal growth factor (EGF) and c-erbB2 kinase and can be used as anti-tumor agents.
Pyrazole derivatives and processes for the preparation thereof
申请人:Novartis AG
公开号:US05981533A1
公开(公告)日:1999-11-09
4-Amino-1H-pyrazolo[3,4-d]pyrimidine derivatives of formula I ##STR1## wherein the symbols are as defined in claim 1, and intermediates for their manufacture are described. The compounds of formula I inhibit especially the tyrosine kinase activity of the receptor for epidermal growth factor and can be used, for example, in the case of epidermal hyperproliferation (psoriasis) and as anti-tumor agents.
a N,N-disubstituted structure, promoted enantioselective conjugate addition reaction of α-branched aldehydes with vinyl sulfone, affording adducts with excellent enantioselectivities (up to 96% ee). Mechanistic studies revealed that the diaminomethylenemalononitrile motif holds the vinyl sulfone substrate using a single hydrogen bond accompanied by multiple weak interactions, including electrostatic
Novel diaminomethylidene derivatives represented by formula (I) ##STR1## wherein R.sup.1 is a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group, a C.sub.3 -C.sub.6 cycloalkyl group and others, R.sup.2 is a group of the following formula ##STR2## and others, R.sup.3 is a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group and others, X is O, S, CHNO.sub.2, C(COOR.sup.4).sub.2, C(COOR.sup.4)CN or C(CN).sub.2) or pharmacologically acceptable salts thereof. The above-mentioned compounds are useful as a gastrointestinal prokinetic agent to be used for the treatment of digestive tract diseases.