Triphenylphosphine → HCID 66718827, compound

Participants

Reaction Steps

To 50 mL of a tetrahydrofuran solution containing 0.81 g (4.94 mmol) of 2-(imidazo[1,2-b][1,2,4]triazin-6-yl)ethanol obtained in the same reaction as in Example 3-(a) were added 1.66 g (4.80 mmol) of ethyl 8-hydroxy-3-oxo-2-(2,2,2-trifluoroethyl)-2,3,4,5-tetrahydro-1H-2-benzazepin-4-acetate (see WO 98/14192A) and 1.76 g (6.71 mmol) of triphenylphosphine, and the mixture was stirred under ice-cooling. Then, 9 mL of a tetrahydrofuran solution containing 1.26 g (6.23 mmol) of diisopropyl azodicarboxylate was added dropwise to the mixture over 45 minutes, the mixture was gradually elevated to room temperature, and stirred for 12 hours.

Provenance & Evidence