An Efficient [2 + 2 + 1] Synthesis of 2,5-Disubstituted Oxazoles via Gold-Catalyzed Intermolecular Alkyne Oxidation
作者:Weimin He、Chaoqun Li、Liming Zhang
DOI:10.1021/ja2029188
日期:2011.6.8
reaction of gold carbene intermediates generated via gold-catalyzed alkyne oxidation has been realized using nitriles as both the reacting partner and the reaction solvent, offering a generally efficient synthesis of 2,5-disubstituted oxazoles with broad substrate scope. The overall reaction is a [2 + 2 + 1] annulation of a terminal alkyne, a nitrile, and an oxygen atom from an oxidant. The reaction conditions
Fused pyrimidine compounds as kinase inhibitors, such as multi-kinase inhibitors, are provided. Fused pyrimidine compounds as IGF-IR inhibitors are provided. Fused pyrimidine compounds that are inhibitors of Trk receptors (e.g., Trk A, Trk B and Trk C) are provided also. The compounds may be used in a method of treating cancer. Pharmaceutical compositions containing a fused pyrimidine compound and a pharmaceutically acceptable carrier are also provided, as are kits containing a fused pyrimidine compound or salt thereof and instructions for use, e.g., in a method of treating cancer.
The invention relates to the use of compounds of general structure (I) in modulation of the Wnt pathway [Formula should be inserted here] wherein R
1
, R
2
, R
3
, R
4
and R
5
are each, independently, H or an alkyl group; D is selected from the group consisting of H, halogen, alkyl, cycloalkyl, aryl, and dialkylamino, each (other than H and halogen) being optionally substituted; Ar is an aryl or heteroaryl group, optionally substituted; Cy is an aryl, heteroaryl or a saturated ring containing at least one heteroatom, each being optionally substituted; and n is an integer from 1 to 3.