Palladium-Catalyzed C–H Homocoupling of Furans and Thiophenes Using Oxygen as the Oxidant
作者:Na-Na Li、Yan-Lei Zhang、Shuai Mao、Ya-Ru Gao、Dong-Dong Guo、Yong-Qiang Wang
DOI:10.1021/ol501019y
日期:2014.5.16
A general and efficient palladium-catalyzedintermolecular direct C–H homocoupling of furans and thiophenes has been developed. The reaction is characterized by using molecular oxygen as the sole oxidant and complete C5-position regioselectivity. Both C2- and C3-substituted furans or thiophenes are appropriate substrates. The approach provides a straightforward, facile, and economical route to bifurans
in silico-guided rational drug design and the synthesis of the suggested ligands, aimed at improving the TRPV1-ligand binding properties and the potency of N-(4-hydroxy-3-methoxybenzyl)-4-(thiophen-2-yl) butanamide I, a previously identified TRPV1 agonist. The docking experiments followed by molecular dynamics simulations and thermodynamic analysis led the drug design toward both the introduction of
with different geometric requirements, amide hydrogen bonding and π‐interactions, on the π‐overlap between calamitic π‐conjugated cores. To this end, we prepared two series of bithiophene diesters and diamides with methylene, ethylene, or propylene spacers between the bithiophene core and the functional groups in their terminal substituents. The hydrogen‐bonded bithiophene diamides showed significantly