Regioselective monobromination of (E)-1-(2′-hydroxy-4′, 6′-dimethoxyphenyl)-3-aryl-2-propen-1-ones using bromodimethylsulfonium bromide and synthesis of 8-bromoflavones and 7-bromoaurones
A wide variety of monobrominated compounds 2a-l have been prepared in good yields from (E)-1-(2′-hydroxy-4′,6′-dimethoxyphenyl)-3-aryl-2- propen-1-ones (1a-l) through regioselective ring bromination using 1.5 equiv of bromodimethylsulfonium bromide (BDMS)
Khan, Abu T.,Choudhury, Abhik,Ali, Shahzad,Musawwer Khan, Md.
experimental part
p. 4852 - 4857
(2012/09/07)
A highly efficient and environmentally benign synthesis of 6,8-dibromoflavones, 8-bromoflavones, 5,7-dibromoaurones and 7-bromoaurones
Various ring substituted 6,8-dibromoflavones (3a-e) as well as 8-bromoflavones (3f-j) can be synthesized easily from the corresponding 2′-hydroxychalcones (1a-j) in good yields and in two steps under environmentally benign reaction conditions. This can be
Khan, Abu T.,Goswami, Papori
p. 4937 - 4940
(2007/10/03)
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