Iodine → 4-((1R,2S)-2-(tert-Butyldimethylsilyloxy)-1-(5-(4-iodophenyl)-1,3,4-oxadiazol-2-yl)propylamino)-2-chloro-3-methylbenzonitrile

Participants

Reaction Steps

To a solution of triphenylphosphine (7.2 g, 27.5 mmol) in DCM (300 mL) was added I2 (7.0 g, 27.5 mmol) at 0° C. After I2 was dissolved completely, Et3N (7.7 mL, 55.2 mmol) was added, followed by a solution of N′-((2R,3S)-3-(tert-butyldimethylsilyloxy)-2-(3-chloro-4-cyano-2-methylphenylamino)butanoyl)-4-iodobenzohydrazide (8.6 g, 13.7 mmol) in DCM (100 mL). The reaction mixture was allowed to warm to room temperature and stirred for an additional 60 min. The reaction was quenched with saturated sodium thiosulfate (50 mL) and diluted with DCM (500 mL). The organic layer was separated and washed with water, brine, dried over Na2SO4 and filtered. After the solvent was removed, the residue was purified by flash chromatography to provide the title compound (7.3 g, 88%). 1H NMR (400 MHz, CDCl3, δ in ppm) 8.06 (d, J=8.6 Hz, 2H), 7.88 (d, J=8.6 Hz, 2H), 7.55 (d, J=8.4 Hz, 1H), 6.66 (d, J=8.4 Hz, 1H), 5.56 (d, J=8.8 Hz, 1H), 5.00 (dd, J=2.0, 8.8 Hz, 1H), 4.74 (m, 1H), 2.59 (s, 3H), 1.62 (d, J=6.3 Hz, 3H), 1.07 (s, 9H), 0.28 (s, 3H), 0.00 (s, 3H).

Provenance & Evidence