Copper-Mediated Cross-Dehydrogenative Coupling of 2-Methylpyridine and 8-Methylquinoline with Methyl Ketones and Benzamides
作者:Gadde Sathish Kumar、Joshua William Boyle、Ciputra Tejo、Philip Wai Hong Chan
DOI:10.1002/asia.201501096
日期:2016.2
synthetic method to prepare (E)‐(pyridin‐2‐yl)enones and (E)‐(quinolin‐8‐yl)enones that relies on the respective copper(I)‐catalyzed formal cross‐dehydrogenative coupling (CDC) reaction of 2‐methylpyridine and 8‐methylquinoline with methyl ketones has been discovered. The mechanism was delineated to follow a pathway involving oxidation of the N‐heterocycle to its corresponding aldehyde adduct prior
A DBU-mediated aldol condensation-dehydration sequence has been used to prepare a series of synthetically important substituted 2- and 3-azachalcones. Michael products that typically accompany this sequence with inorganic bases were not observed in this protocol of high practical value.