Abstract
A synthetic route toward isochromenes 6, starting with aldehydes 3, in good to excellent yield is described herein. This novel approach was carried out by the Henry reaction of 3 with NH4OAc and nitroalkanes (MeNO2 or EtNO2), aerobic Wacker-type oxidation of the resulting nitroalkenes 4, followed by K2CO3-promoted intramolecular Michael cyclization in modest to good yields.
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