(2S,4R)-N-[(1S)-2-hydroxy-1-[(3R,4S,5R,6R)-3,4,5-trihydroxy-6-methylsulfanyloxan-2-yl]propyl]-1-methyl-4-propylpyrrolidine-2-carboxamide → Lincomycin

Beteiligte Stoffe

Reaktionsschritte

A crude crystalline lincomycin A preparation contained 20% of lincomycin B; the remaining solid material was primarily A. This starting material is used for twenty 18 g runs over two Prep PAK C18 cartridges eluted isocratically with (2:1) water-methanol. Pool cuts are made. The B rich pool is concentrated to an aqueous to which enough methanol is added to make a mobile phase; this is reinjected into the Prep 500. Rich eluent from the second hpplc is concentrated as before and rechromatographed a third time. Yield: 24 g of ~99% pure lincomycin B and ca. 125 g of highly pure lincomycin A. The entire isolation scheme is outlined in Chart 2.

Herkunft & Nachweise