Trimethyl phosphite → HCID 136375590, compound

Participants

Reaction Steps

A solution of 26 (200 mg, 240 μmol) in trimethylphosphite (2.2 mL) and toluene (5 mL) was heated to 120° C. under argon for 17 h. The reaction mixture was cooled and concentrated under vacuum. The residue was chromatographed [silica, CHCl3→CHCl3/ethyl acetate (95:5)] to afford a purple solid (164 mg, 79%): 1H NMR δ −2.57 (br s, 2H), 1.84-1.85 (m, 18H), 2.62 (s, 9H), 3.50 (d, J=21.6 Hz, 2H), 3.87 (d, J=11.1 Hz, 6H), 7.27 (s, 6H), 7.67 (dd, J1=8.4 Hz, J2=1.8 Hz, 2H), 8.15 (d, J=7.8 Hz, 2H), 8.63 (s, 4H), 8.67 (d, J=4.8 Hz, 2H), 8.75 (d, J=4.8 Hz, 2H); 31P NMR δ 29.50; LDMS obsd 863.2; FABMS obsd 862.4045; calcd 862.4012 (C56H55N4O3P); λabs=421, 514, 547, 593, 649 nm.

Provenance & Evidence