Synthesis and reactions of 5-tributylstannyl-4-fluoro-1H-pyrazole
摘要:
The palladium-catalyzed cross-coupling reactions of 5-tributylstannyl-4-fluoro-1H-pyrazole with aryl iodides provided high yields of the corresponding 5-aryl-4-fluoro-1H-pyrazoles. Furthermore, these cross-coupling reactions proceeded smoothly under an atmosphere of carbon monoxide (CO) to afford the corresponding 5-acyl-4-fluoro-1H-pyrazoles as CO-insertion products. (c) 2007 Elsevier Ltd. All rights reserved.
The palladium catalyzed cross-coupling reactions of aryl iodides and 5-tributylstannyl-4-fluoropyrazole prepared from fluoro(tributylstannyl)acetylene proceeded smoothly giving the corresponding 5-aryl-4-fluoropyrazole in good yields.
The palladium-catalyzed cross-coupling reactions of 5-tributylstannyl-4-fluoro-1H-pyrazole with aryl iodides provided high yields of the corresponding 5-aryl-4-fluoro-1H-pyrazoles. Furthermore, these cross-coupling reactions proceeded smoothly under an atmosphere of carbon monoxide (CO) to afford the corresponding 5-acyl-4-fluoro-1H-pyrazoles as CO-insertion products. (c) 2007 Elsevier Ltd. All rights reserved.