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- W2100055769 abstract "Abstract The n-BuLi and lithium 2,2,6,6-tetramethylpiperidine (LTMP) metalation of imidazo[1,2-a]pyrazine heterocycles and subsequent quenching with electrophiles is described. Bromine atoms exhibit different behaviours towards lithiation depending on their positions (3 or 6) on the imidazo[1,2-a]pyrazine heterocycle. Halogen-metal exchange occurs readily with the bromine on position 3. On the contrary, bromine on position 6 only leads to C-5 substituted derivatives further to an ortho-directing effect." @default.
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- W2100055769 date "2010-06-19" @default.
- W2100055769 modified "2023-09-24" @default.
- W2100055769 title "ChemInform Abstract: Aza-Indolizine with Bridgehead Nitrogen. Metalation, Halogen-Metal Exchange and Directed ortho-Lithiation in the Imidazo[1,2-a]pyrazine Series." @default.
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- W2100055769 doi "https://doi.org/10.1002/chin.199838184" @default.
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