Trityl chloride → 1,1,1-Triphenyl-14,17,20,23,26,29-hexaoxa-2-thiahentriacontan-31-ol

Participants

Reaction Steps

To a solution of 2-{2-[2-(2-{2-[2-(11-mercapto-undecyloxy)-ethoxy]-ethoxy}-ethoxy)-ethoxy]-ethoxy}-ethanol (3) (1.22 g, 2.6 mmol) prepared according to the method of Pale-Grosdemange et al.†, dissolved in 10 mL of THF was added triphenylmethyl chloride (1.46 g, 5.2 mmol). After stirring at room temperature for 48 hours, the reaction mixture was concentrated. The crude residue was purified by flash chromatography (gradient elution, EtOAc to 20:1 EtOAc/MeOH) to afford 910 mg (49%) of 4. 1H NMR (CDCl3, 400 MHz) d 7.36 (d, J=X Hz, 6H), 7.22 (t, J=X Hz, 6H), 7.15 (t, J=X Hz, 3H), 3.72-3.48 (br m, 24H), 3.40 (t, J=X Hz, 2H), 2.08 (t, J=X Hz, 2H), 1.52 (m, 2H), 1.4-0.9 (br, 16H). ES-MS: m/z 733.4 (M+Na+). † Pale-Grosdemange, C.; Simon, E. S.; Prime, K. L.; Whitesides, G. M. J. Am. Chem. Soc, 1991, 113, 12-20.

Provenance & Evidence