反应详情

First, the amine compound N-methyl-L-valyl-N-[(3R,4S,5S)-1-{(2S)-2-[(1R,2R)-3-{[(2S)-1-tert.-butoxy-1-oxo-3-phenylpropan-2-yl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidin-1-yl}-3-methoxy-5-methyl-1-oxoheptan-4-yl]-N-methyl-L-valinamide was produced as sodium trifluoroacetate, analogous to the synthesis described in example 10, by means of coupling N-(tert.-butoxycarbonyl)-N-methyl-L-valyl-N-[(3R,4S,5S)-1-{(2S)-2-[(1R,2R)-2-carboxy-1-methoxypropyl]pyrrolidin-1-yl}-3-methoxy-5-methyl-1-oxoheptan-4-yl]-N-methyl-L-valinamide (intermediate 15) with L-phenylalaninamide-hydrochloride in the presence of O-(7-Azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium-hexafluorophosphate, followed by cleavage of the Boc protected group with the help of trifluoroacetic acid. Out of 47 mg (0.049 mmol) of this compound 39 mg (96% o. th.) of the title compound were obtained in analogy to the production of example 6, treated with 4-ketobutyric acid in the presence of sodium cyanoborohydride.