Bacitracin → Bacitracin Zn Lasalocid

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반응 단계

A solution of 2.5 g of zinc lasalocid in 50 ml of methanol was stirred and 3.0 g of regular bacitracin was added. The mixture was stirred to dissolve all solids. The resulting solution was set aside and held at ambient temperature for 24 hours. The precipitated complex was isolated, rinsed with methanol, and dried; wt. 2.3 g. Analytical sample was recrystallized from methylene chloride and methanol. The crude complex was dissolved at room temperature in a mixture of 90% methylene chloride and 10% methanol. Solution was filtered to remove traces of insoluble and the complex recovered from the filtrate by the slow addition of additional methanol. The complex was also recovered from the filtrate by the slow removal of the methylene chloride under reduced pressure at 30°-35° C.

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