Triethylamine → HCID 11676244, compound

Participants

Reaction Steps

Triethylamine (0.38 mL, 2.75 mmol) was added to a solution of 5-methyl-DL-tryptophan (0.20 g, 0.92 mmol) and 4-but-2-ynyloxy-benzenesulfonyl chloride (0.25 g, 1.01 mmol) in H2O-dioxane (1.6 mL/2.4 mL) at room temperature. The reaction mixture was stirred for 20 hours at room temperature. The mixture was then concentrated and acidified with HCl. The mixture was extracted with ethyl acetate (3×10 mL). The organic solution was washed with H2O and brine, dried over Na2SO4, and concentrated. The residue was purified by RP-HPLC to give 0.32 g (81%) of the title compound as a pale yellow solid. Mp=45-46° C.; 1H NMR (DMSO-d6): 400 MHz δ 12.54 (bs, 1H), 10.64 (s, 1H), 8.05 (d, J=8.0 Hz, 1H), 7.53 (m, 2H), 7.17 (d, J=8.0 Hz, 1H), 7.00 (m, 2H), 6.95 (m, 2H), 6.86 (dd J=8.0, 4.0 Hz, 1H), 4.78 (q, J=2.4 Hz, 2H), 3.81 (q, J=7.6 Hz, 1H), 3.00 (dd J=14.4, 6.8 Hz, 1H), 2.79 (dd J=14.4, 7.8 Hz, 1H), 2.33 (s, 3H), 1.82 (t, J=2.4 Hz, 3H); HRMS: calcd for C22H23N2O5S (ESI+, [M+H]1+), 427.1322; found 427.1327; LCMS m/z (ESI) [M+H]1+ 427, retention time=2.69 min.

Provenance & Evidence