Synthesis of 4-(Dimethylamino)quinazoline via Direct Amination of Quinazolin-4(3H)-one Using N,N-Dimethylformamide as a Nitrogen Source at Room Temperature
作者:Yiyuan Peng、Xin Chen、Qin Yang、Yirong Zhou、Zhihong Deng、Xuechun Mao
DOI:10.1055/s-0034-1380550
日期:——
that affords the corresponding 4-(dimethylamino)quinazolines in high yields. This transformation proceeds through efficient 4-toluenesulfonyl chloride mediated C–OH bond activation at room temperature. An efficient direct amination of quinazolin-4(3H)-ones using N,N-dimethylformamide as a nitrogen source is described that affords the corresponding 4-(dimethylamino)quinazolines in high yields. This
Heterocyclic and bicyclic compounds, compositions and methods
申请人:Pal Manojit
公开号:US20060128702A1
公开(公告)日:2006-06-15
The present invention provides, among other things, new bicyclo heterocyclic compounds, compositions comprising these heterocyclic compounds, methods of making the heterocyclic compounds, and methods of using these heterocyclic compounds for treating a variety of conditions and disease states associated with, for example, cellular proliferation, inflammation, glycosidase expression, or the low expression of Perlecan.
The present invention relates to compounds useful as inhibitors of voltage-gated sodium channels and calcium channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
The present invention relates to compounds useful as inhibitors of voltage-gated sodium channels and calcium channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
Synthesis and Basicity of 4-(N,N-Dimethylamino)-2-arylquinazolines
作者:Wojciech Zielinski、Agnieszka Kudelko、Elizabeth M. Holt
DOI:10.3987/com-96-7416
日期:——
The reaction of substituted N-phenylbenzimidoyl chlorides with N,N-dimethylcynanamide in the presence of titanium tetrachloride has yielded seven 4-(N,N-dimethylamino)-2-arylquinazolines substituted on the phenyl ring with electron donating or withdrawing groups. pKa values have been determined for these compounds and analyzed in conjunction with the Hammett sigma constants to observe the influence of these phenyl substituents upon the basicity of 4-(N,N-dimethylamino)-2-arylquinazolines. The rho value, single crystal X-ray analysis and N-15-nmr spectra give evidence about the preferential site of protonation in such systems.