Palladium??Catalyzed Sonogashira Reaction for the Synthesis of Arylalkynecarboxylic Acids from Aryl Bromides at Low Temperature

K Park, JM You, S Jeon, S Lee

Index: Park, Kyungho; You, Jung-Min; Jeon, Seungwon; Lee, Sunwoo European Journal of Organic Chemistry, 2013 , # 10 p. 1973 - 1978

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Citation Number: 7

Abstract

Abstract A variety of aryl bromides were coupled with propiolic acid in the presence of 1, 8- diazabicyclo [5.4. 0] undec-7-ene (DBU) and catalyst Pd (PPh 3) 4 to afford the corresponding arylalkynecarboxylic acids in good yields at low temperature. This method showed good tolerance toward functional groups such as alkoxy, ketone, ester, aldehyde, cyano, nitro, and hydroxy. Under these conditions, propiolic acid showed higher reactivity ...