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Total synthesis of Croomine:
Reference: Martin, S. F.; Barr, K. J. J. Am. Chem. Soc. 1996, 118, 3299. DOI
Keywords: N-Boc -> N-H --- CarboxEster -> CarboxAcid --- Li-Furyl+Alkyl-Br --- Mannich, vinylogous --- Enolsilane+Iminium --- Amine-5 --- Lactone-5 --- Mannich, vinylogous --- Hydrogenation-EneLactone --- Hydrogenation-EneLactone --- Amine+Alkyl-X --- Amine-7 --- Enolsilane+Iminium --- Lactone-5 --- Decarbonylation
Reagents: SiiPr3-OTf --- Furyl-Li --- BuLi(sec), TMEDA --- SiiPr3-OTf --- CF3CO2H --- H2, Rh --- DMF (solvent) --- HBr --- POCl3 --- H2, Pd --- HCl, EtOH

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