Abstract
A straightforward synthesis of α-keto amides by coupling primary amines with aryl dibromoethanones under oxidative amidation conditions has been developed. The α-keto amides were then subjected to heterocyclodehydration reaction under Bischler-Napieralski conditions followed by aromatization with DBU provided 1-benzoyl isoquinolines in a two-stage process. Utilizing this methodology, isoquinoline alkaloids such as thalmicrinone, papavaraldine, and pulcheotine A were synthesized in excellent yields.
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