tert-butyl N-(4-[[(3R)-3-[2-[(tert-butyldimethylsilyl)oxy]ethyl]-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2 (6),9,11-tetraen-12-yl]oxy]-1-ethylcyclohexyl)carbamate → tert-butyl N-(1-ethyl-4-[[(3R)-3-(2-hydroxyethyl)-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2 (6),9,11-tetraen-12-yl]oxy]cyclohexyl)carbamate

Participants

Reaction Steps

To a 25-mL round-bottom flask containing a solution of tert-butyl N-(4-[[(3R)-3-[2-[(tert-butyldimethylsilyl)oxy]ethyl]-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2 (6),9,11-tetraen-12-yl]oxy]-1-ethylcyclohexyl)carbamate (240 mg, 0.42 mmol, 1.00 equiv) in 10 mL of THF was added TBAF-3H2O (264 mg, 0.84 mmol, 2.01 equiv) at room temperature. The resulting solution was stirred for 3 h at this temperature and concentrated under reduced pressure. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:1) to give 180 mg (94%) of the desired tert-butyl N-(1-ethyl-4-[[(3R)-3-(2-hydroxyethyl)-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2 (6),9,11-tetraen-12-yl]oxy]cyclohexyl)carbamate as a colorless oil. MS: m/z 462 (M+H)+.

Provenance & Evidence