Triethylborane → 2-[(4aS,6R,7aS)-2-(4-methoxyphenyl)-hexahydrocyclopenta[d][1,3]dioxin-6-yl]-1H-isoindole-1,3(2H)-dione

Participants

Reaction Steps

To a solution of O-[(4aS,6R,7S,7aR)-6-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-2-(4-methoxyphenyl)hexahydrocyclopenta[d][1,3]dioxin-7-yl] O-phenyl thiocarbonate (56.9 mg, 0.107 mmol) in toluene (4.00 mL) was added tris(trimethylsilyl)silane (0.0700 mL, 0.227 mmol). Air (2.00 mL) was bubbled through the solution and a 1.00 M solution of triethylborane in hexane (0.0320 mL, 0.0320 mmol) was added and the reaction was stirred for 2 h. More tris(trimethylsilyl)silane (0.0700 mL, 0.227 mmol) and 1.00 M triethylborane in hexane (0.0300 mL, 0.0300 mmol) were added, and the mixture was stirred another 6 h. The mixture was then concentrated in vacuo and the residue was purified via silica gel chromatography eluting with a gradient of 0 to 20% EtOAc in DCM to afford the title compound (16.9 mg, 42%). LC/MS: Rt=2.03 min, ES+ 380. (AA standard).

Provenance & Evidence