Diisopropylethylamine → HCID 90763427, compound

Participants

Reaction Conditions

Reaction Steps

A solution of Example 7B (0.36 g, 0.77 mmol) in dichloromethane (5 mL) was treated with O-(1,2-dihydro-2-oxo-1-pyridyl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TPTU) (0.344 g, 1.5 equivalent), and diisopropylethyl amine (0.4 μL, 3 equivalents) at 0° C. over 20 min. A solution of Example 3A (0.22 g, 1.5 equivalent) in dichloromethane (5 mL) was added at 0° C. and the mixture was stirred at 25° C. for 16 hrs. The mixture was washed with water, 10% sodium bicarbonate, brine, the organic layer was separated, dried over sodium sulfate, filtered and the solvents were evaporated. The crude residue was purified using 1% methanol/chloroform to give 0.37 g (76%) of the title compound.

Provenance & Evidence