Azoles. Part 5. Metal-Halogen Exchange Reactions of Polybromoimidazoles
1,2-Dilithiated imidazoles were prepared by treating 2-bromo-4,5-dichloro- and 2,4,5-tribromoimidazole with 2 equivalents of butyl-lithium and trapped with various electrophiles to give moderate yields of the 2-substituted 4,5-dihalogeno compounds (4)-(10
Iddon, Brian,Khan, Nazir
p. 1445 - 1452
(2007/10/02)
A Convenient Synthesis of Thienoimidazoles
1-Protected and 1,2-diprotected derivatives of 4-bromoimidazole-5-carbaldehyde were prepared from imidazole via 2,4,5-tribromoimidazole and reacted with ethyl 2-mercaptoethanoate to give the title compounds.
Iddon, Brian,Khan, Nazir,Lim, Bee Lam
p. 1428 - 1429
(2007/10/02)
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