Fluoride Ion Promoted Azomethine Ylid Generation from 1-Methyl-2-[methylthio(trimethylsilylmethylimino)methylimino]-1,2-dihydropyridine, a Synthetic Equivalent of Aminonitrile Ylid
摘要:
1-Methyl-2-[methylthio(trimethylsilylmethylimino)methyl-imino]-1,2-dihydropyridine (1), prepared from 2-amino-1-methyl-pyridinium iodide in 3 steps, reacted with carbonyl compounds in the presence of cesium fluoride in acetonitrile to give 2-(1-methyl-1,2-dihydropyridylidene)aminooxazoline derivatives (6) via the 1,3-dipolar cycloadditon. This reaction was the first example of reaction of aminonitrile ylid with the C=O double bond.