ONE-POT SYNTHESIS OF ALKOXYAMINE DERIVATIVES BY REDUCTIVE ALKOXYAMINATION WITH A 2-PICOLINE-BORANE COMPLEX
2009
Reduction of oxime ethers with a 2-picoline-borane complex was examined to give alkoxyamine derivatives. The reduction was found to proceed in the presence of aqueous HCl in MeOH-AcOH. The method was extended to one-pot synthesis of alkoxyamine derivatives from aldehydes and ketones. The reaction of carbonyl compounds with alkoxyamines in MeOH-AcOH (10:1), followed by sequential treatment with 2-picoline-borane and 3M HCl afforded alkoxyamine derivatives in good yields. This procedure can be applied to the synthesis of various alkoxyamine derivatives from aliphatic/aromatic aldehydes and ketones.
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