Ethano- and etheno-bridged 2-pyridyl isoxazoles and thiazoles, and their reduced variants
Abstract
(E)-2-(2-Oxobut-3-enyl)pyridine 21, (E)-2-(but-1-en-3-ynyl)pyridine 7 and (E)-2-(buta-1,3-dienyl)pyridine 15 are precursors for 2-pyridyl etheno-bridged isoxazoles and thiazoles, and a range of specifically reduced variants.