Abstract
AbstractA diastereoselective approach to access cis‐pyrido and pyrrolo[1,2‐c][1,3]oxazin‐1‐ones has been developed through a one‐pot BF3.Et2O‐catalyzed [4+2] process starting with N,O‐acetals and terminal alkynes. In addition, the utility of this transformation is demonstrated by the scalable synthesis of (+)‐Febrifugine in 7 steps from the N,O‐acetal (15% overall yield).magnified image
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