Thionyl Chloride → 3-Chloro-3-(4-chlorophenyl)-2-(4-methylbenzyl)isoindolin-1-one

Participants

Reaction Steps

Distilled THF (10 mL) was added to 3-(4-chlorophenyl)-3-hydroxy-2-(4-methylbenzyl)-isoindolin-1-one (400 mg, 1.13 mmol), thionyl chloride (295.8 mg, 2.48 mmol, 0.18 mL) and catalytic DMF (3 drops) as for general procedure B1. 3-Chloro-3-(4-chlorophenyl)-2-(4-methylbenzyl)isoindolin-1-one was produced as a viscous yellow oil (418 mg, 1.13 mmol) which was used immediately without further purification. Distilled THF (3 mL) was added to 3-chloro-3-(4-chlorophenyl)-2-(4-methylbenzyl)isoindolin-1-one (418.1 mg, 1.13 mmol) and the resultant solution added dropwise to cis-cyclopentene diol (285 mg, 2.85 mmol) and dried K2CO3 (390.41 mg, 2.85 mmol) in distilled THF (3 mL) as for general procedure B1. Removal of the solvent yielded the crude product as a green oil (359 g). Purification by flash column chromatography yielded the title product as a colourless viscous oil (242.1 mg, 0.55 mmol, 50%) 1H NMR: (300 MHz, DMSO) δ ppm 1.19 (m, 1H, H16/16′), 1.67, 2.05 (m, 1H, H16/16′) 2.21 (s, 3H, H12), 3.85 (m, 1H, HO, 4.06 (d, 1H, J=15.21 Hz, H9/9′), 4.32 (m, 1H, H15) 4.53 (d, 1H, J=15.21 Hz, H9/9′), 4.81, 5.74, (dd, 1H, H18/19) 5.20, 5.66 (dd, 1H, H18/19), 6.95 (m, 4H, H10, H11, H13, H14), 7.25 (m, 5H, H1-H5), 7.65 (m, 2H, H6-H7) 7.74 (d, 1H, H8). IR: 1380, 1467, 1699, 2922 cm−1. HR-MS (EI): Calculated mass: [M+H]+446.1517. Found: 446.1517.

Provenance & Evidence