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Using 2-bromo-1-methylpyridimium iodide as carboxyl activating agent, 10 ansa-macrolactams were prepared conveniently from the corresponding seco-precursor w-aminoacids in the yields of 78-2%.
Using 2-bromo-1-methylpyridimium iodide as a carboxyl activating agent, 10 ansa-macrolactams were prepared conveniently from the corresponding seco-precursor w-aminoacids in yields of 78-2%.