HCID 57323532, compound → HCID 57210039, compound

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Reaction Steps

To a solution of 17-ethyl-1-hydroxy-14-(tert-butyldimethylsiloxy)-12-[2'-(4"-(tert-butyldimethyl-siloxy)-3"-isopropyloxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos18-ene-2,3,10,16-tetraone (130 mg) in acetonitrile (4 ml) was added a solution of 2% HF in aqueous acetonitrile (70 μl), and the mixture stirred at room temperature. After 5.5 hours, the solution was diluted with ethyl acetate, extracted with saturated sodium bicarbonate solution and the organic phase dried over magnesium sulfate. Purification of the concentrate by flash chromatography on silica gel (ethyl acetate: hexane (1:2)+1% methanol) gave the title compound (80 mg).

Provenance & Evidence