A selective, nonchelation‐assisted methylation of arenes has been developed. The overall transformation, which combines a C−H functionalization reaction with a nickel‐catalyzed cross‐coupling, offers rapid access to methylated arenes with high para selectivity. The reaction is amenable to late‐stage methylation of small‐molecule pharmaceuticals.
One-Pot Synthesis of Pyrimidines via Cyclocondensation of β-Bromovinyl Aldehydes with Amidine Hydrochlorides
作者:Shengjiao Yan、Yajuan Tang、Fuchao Yu、Jun Lin
DOI:10.1002/hlca.201000264
日期:2011.3
A series of pyrimidines were prepared by cyclocondensation of β‐bromovinyl aldehydes with amidinehydrochlorides in the presence of Et3N in excellent yields (74–95%).
The present invention relates to novel derivatives of the general formula (I), their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their hydrates, their solvates, their pharmaceutically acceptable salts and pharmaceutically acceptable compositions containing them. The present invention more particularly provides novel pyrimidine derivatives of the general formula (I).