Thermoregulated Copper-Free Sonogashira Coupling in Water
作者:Ning Liu、Chun Liu、Qiang Xu、Zilin Jin
DOI:10.1002/ejoc.201100367
日期:2011.8
The Sonogashiracross-couplingreaction between aryl halides and terminal alkynes was carried out smoothly in water over a thermoregulated ligand–palladium catalyst under copper-free conditions, resulting in good to excellent yields. The Sonogashirareaction was sensitive to the electronic nature of the substituents on the aryl halides. Aryl halides with an electron-withdrawing group showed higher
Provided are compounds of Formula I:
wherein X is:
R
1
and R
2
together with the phenyl to which they are bound may form a bicyclic, fused heterocyclic ring, and all other variables are as defined herein, as well as their use in treating pulmonary inflammation or bronchoconstriction and compositions comprising and processes for preparing the same.
This invention provides compounds of the formula:
wherein X is
wherein R1 and R2 together with the phenyl to which they are bound may form a bicyclic, fused heterocyclic ring and all other variables are as defined herein, their use in pulmonary inflammation or bronchoconstriction therapy and compositions comprising and processes for preparing the same are provided.
Provided are compounds of Formula I:
wherein X is:
R1 and R2 together with the phenyl to which they are bound may form a bicyclic, fused heterocyclic ring, and all other variables are as defined herein, as well as their use in treating pulmonary inflammation or bronchoconstriction and compositions comprising and processes for preparing the same.