Pyrimidine derivatives and processes for the preparation thereof
申请人:Ciba-Geigy Corporation
公开号:US05521184A1
公开(公告)日:1996-05-28
There are described N-phenyl-2-pyrimidine-amine derivatives of formula I ##STR1## wherein R.sub.1 is 4-pyrazinyl, 1-methyl-1H-pyrrolyl, amino- or amino-lower alkyl-substituted phenyl wherein the amino group in each case is free, alkylated or acylated, 1H-indolyl or 1H-imidazolyl bonded at a five-membered ring carbon atom, or unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R.sup.2, R.sup.3, R.sup.9, X, Y, n and R.sup.10 are defined in claim 1 These compounds can be used, for example, in the therapy of tumoral diseases.
Rh(<scp>iii</scp>)-catalyzed cascade annulation reaction of <i>N</i>,<i>N</i>-dimethyl enaminones with iodonium ylides to give substituted isocoumarins
isocoumarins starting from easily available N,N-dimethyl enaminones and iodonium ylides via a Rh(III)-catalyzed C–H bond activation/annulationcascadereaction is herein described. This protocol proceeds under mild conditions and provides access to a wide variety of isocoumarin derivatives in good to excellent yields with good functional group compatibility. Furthermore, the gram-scale synthesis and various
本文描述了从容易获得的N , N-二甲基烯胺酮和碘叶立德通过Rh( III ) 催化的 C-H 键活化/成环级联反应组装异香豆素。该方案在温和条件下进行,并提供了多种异香豆素衍生物,其收率良好至优异,且具有良好的官能团相容性。此外,克级合成和各种进一步的化学转化增强了其合成效用。