A Mild and Regioselective Route to Functionalized Quinazolines
作者:Tracy M. M. Maiden、Stephen Swanson、Panayiotis A. Procopiou、Joseph P. A. Harrity
DOI:10.1002/chem.201502891
日期:2015.10.5
A Rh‐catalyzed ortho‐amidation cyclocondensation sequence gave a range of 4‐aminoquinazolines in high yield. The method features a remarkably mild C(sp2)H activation step and can be exploited to rapidly access compounds with established biological activity.
Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
A rare, ruthenium‐catalyzed, oxazolinlyl assistedC−Hfunctionalization and three‐componentcascadecyclization for the synthesis of isoquinolinones via a metal‐carbenemigratoryinsertion is reported. The transformation is unique since it involves the formation of multiple bonds in onepot via C−Hfunctionalization and ring opening of oxazolines. Detailed mechanistic investigations reveal interesting
A novel method for the synthesis of β-nitrate ester carboxamides using non-corrosive tert-butyl nitrite (TBN) as the nitro source and easily available oxygen as the oxidant has been developed. Variously substituted 2-oxazolines were efficiently ring-opened to deliver the corresponding products in excellent yields. Notably, this reaction provides fast access to pharmaceuticals such as nicorandil.
The Rh(III)-catalyzed amidation of C(sp2)-H bonds has been reported by employing the N-methoxyamide as a novel amino source. An excellent level of functional group tolerance can be achieved when N-methoxyamide derivatives are used as the amidating reagents. Importantly, several known bioactive compounds such as Aminalon, Pregabalin, Gabapentin, and Probenecid can be transformed to effective amidating