N,N,N',N'-Tetramethylethylenediamine → HCID 10523738, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 13 (124 mg, 0.49 mmol) in 2.0 mL anhydrous THF was cooled to −20° C. and treated with TMEDA (0.26 mL, 1.71 mmol) followed by n-BuLi (0.69 mL of a 2.5 M solution in hexanes, 1.71 mmol) in a slow dropwise manner. The resulting gold solution stirred for 4 h at −20° C. The reaction mixture was treated with 1-chloro-2-iodoethane (0.126 mL, 1.71 mmol) and stirred for 15 min at 25° C. The reaction was diluted with H2O (30 mL), extracted with Et2O (3×20 mL), and the combined organic extracts were washed with saturated aqueous NaCl, dried Na2SO4) and concentrated under reduced pressure. Flash chromatography (SiO2, 2.5×10 cm, 0-10% EtOAc/hexane gradient) yielded recovered 13 (51.8 mg, 41%) and 14 (85.5 mg, 46%) as a white solid: mp 82-84° C.; 1H NMR (CDCl3, 400 MHz) δ7.72 (d, J=8.2 Hz, 1H), 7.21 (t, J=6.0 Hz, 1H), 7.01 (br s, 1H), 6.72 (dd, J=1.2, 8.2 Hz, 1H), 5.21 (s, 2H), 3.47 (s, 3H), 1.49 (s, 9H);13C NMR (CDCl3, 100 MHz) δ156.0, 152.5, 140.1, 129.5, 113.4, 108.9, 94.8, 82.4, 80.9, 54.4, 28.3; IR (film) νmax 3388, 2977, 1736, 1592, 1515, 1465, 1406, 1252, 1226, 1153, 1005 cm−1; FABHRMS (NBA/CsI) m/z 511.9351 (C13H18INO4+Cs+ requires 511.9335).

Provenance & Evidence