(R)-1-(Pyridin-3-yl)ethanamine → tert-butyl-(3R)-3-({[(1S)-2,2-dimethyl-1-{[(1R)-1-(3-pyridyl)ethylamino]carbonyl}propyl]amino}carbonyl)-6-[3-methyl-(4-phenyl)phenyl]-hexanoate

Participants

Reaction Steps

According to the method of Example 25(a), tert-butyl (3R)-3-({[(1S)-1-(carboxy)-2,2-dimethylpropyl]amino}carbonyl)-6-[3-methyl-(4-phenyl)phenyl]hexanoate (Preparation 19c)(497 mg, 1.0 mmol) was reacted with (R)-(+)-1-(3-pyridyl)ethylamine (122 mg, 1.0 mmol) at room temperature for 2.5 h, followed by the same work up and purification by flash chromatography (gradient elution with hexane:ethyl acetate 4:1 to 100% ethyl acetate) gave tert-butyl-(3R)-3-({[(1S)-2,2-dimethyl-1-{[(1R)-1-(3-pyridyl)ethylamino]carbonyl}propyl]amino}carbonyl)-6-[3-methyl-(4-phenyl)phenyl]-hexanoate (537 mg, 89%) as a colourless foam.

Provenance & Evidence