5-Bromonicotinamide → N-(5-bromopyridin-3-yl)acetamide

Beteiligte Stoffe

Reaktionsschritte

Other representative compounds include (E)-N-methyl-4-[3-(5-acetamidopyridinyl)]-3-buten-1-amine and (E)-N-methyl-4-[3-(5-carbamoylpyridinyl)]-3-buten-1-amine. These compounds may be produced according to the techniques set forth in C. V. Greco et al., J. Heterocyclic Chem. 7 (4): 761 (1970). More specifically, the commercially available starting material, 5-bromonicotinic acid is converted to both 5-bromonicotinamide and 3-amino-5-bromopyridine. The 3-amino-5-bromopyridine can be acylated with acetic anhydride to give 3-acetamido-5-bromopyridine. 3-Acetamido-5-bromopyridine may then be reacted with N-methyl-N-(tert-butoxycarbonyl)-3-buten-1-amine (prepared according to the preceeding techniques) using the Heck reaction described hereinabove and set forth in W. C. Frank et al., J. Org. Chem. 43 (15): 2947 (1978). The reaction gives (E)-N-methyl-N-(tert-butoxycarbonyl)-4-[3-(5-acetamidopyridinyl)]-3-buten-1-amine. The Heck reaction of 5-bromonicotinic acid with N-methyl-N-(tert-butoxycarbonyl)-3-buten-1-amine gives (E)-N-methyl-N-(tert-butoxycarbonyl)-4-[3-(5-carbamoylpyridinyl)]-3-buten-1-amine. The treatment of either product with aqueous acid effects the removal of the tert-butoxycarbonyl groups from these compounds, giving the 5-acetamido and 5-carbamoyl substituted metanicotinic compounds respectively.

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