Whitby group

To a stirred solution of tert-butyl((3-((3aR,6aR)-5-hexyl-4-phenyl-1,2,3,3a,6,6a-hexahydropentalen-3a-yl)but-3-en-1-yl)oxy)dimethylsilane (0.25 g, 0.74 mmol, 1 equiv.) in THF (10 mL) was added slowly dropwise TBAF (1 M solution in THF, 1.51 mL, 1.51 mmol, 2 equiv.).  The reaction was stirred for 16 hours

The reaction was diluted with diethyl ether (20 mL) and washed with water (20 mL).  The water layer was washed with diethyl ether (2 x 20 mL).  The diethyl ether layers were combined and washed with water (2 x 50 mL) and brine (50 mL) before being dried over magnesium sulphate, filtered and concentrated under reduced pressure. 

The product was purified by column chromatography (silica gel, 25 % diethyl ether in hexane) to yield the pure product as a yellow oil (0.18 g, 0.52 mmol, 52 % over two steps).  

Takacs, J. M.; Zhang, Q. Org Lett 2008, 10, 545.