Acetonitrile → HCID 86762201, compound

Participants

Reaction Conditions

Reaction Steps

A 250-mL single-neck round-bottomed flask equipped with a magnetic stirrer and nitrogen inlet was charged with 216a (450 mg, 0.631 mmol) and acetonitrile (8 mL), and the mixture was cooled to 0° C. Triethylamine (4 mL) was added followed bis trimethyl-silyl trifluoroacetamide (4 mL), and the mixture was stirred at room temperature for 40 h. After this time, the mixture was concentrated under reduced pressure and the resulting residue was purified by flash column chromatography (silica, 40:20:40 chloroform/methanol/ammonia) to afford 216b in 52% yield (210 mg) as an amorphous yellow solid: mp 260-262° C. d; 1H NMR (500 MHz, DMSO-d6) d 9.12 (s, 1H), 8.66 (s, 1H), 8.62 (d, J=2.0 Hz, 1H), 8.27 (d, J=4.0 Hz, 1H), 7.54 (s, 1H), 7.43 (t, J=7.5 Hz, 1H), 7.32-7.27 (m, 3H), 7.15 (br s, 2H), 4.69 (d, J=9.0 Hz, 1H), 4.46 (d, J=7.0 Hz, 1H), 3.87-3.83 (m, 3H), 3.57 (s, 3H), 3.36-3.17 (br s, 8H), 2.77-2.63 (m, 3H), 1.23 (s, 3H), 1.21 (s, 3H); MS (ESI+) m/z 608.2 (M+H for C29H30N5O6PS).

Provenance & Evidence