Water → 17-Ethyl-1-hydroxy-12-[2'-[4"-azido-3"-ethoxycyclohexyl]-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 17-ethyl-1-hydroxy-12-[2'-[4"-(2"'-nitrobenzenesulfonyloxy)-3"-ethoxycyclohexyl]-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone (87 mg, Example 47) in dry DMF (1 ml) is added sodium azide (16.7 mg) in one portion. The reaction is heated at 80° C. under nitrogen atmosphere for 3 h. The reaction mixture is cooled, poured into water (5 ml) and extracted with ethyl acetate. Normal work-up followed by preparative tlc on silica gel gives the title compound.

Provenance & Evidence