Diisopropylethylamine → 1-(tert-butoxycarbonyl)-2-methyl-L-prolyl-N-{(1S,2R)-4-{(2S)-2-[(1R,2R)-3-{[(1S)-1-benzyl-2-methoxy-2-oxoethyl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidin-1-yl}-2-methoxy-1-[(1S)-1-methylpropyl]4-oxobutyl}-N-methyl-L-valinamide

Participants

Role	Name	HCID	Charge
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)	HCID 9886157	—
Reactant	(2S)-1-(tert-Butoxycarbonyl)-2-methylpyrrolidine-2-carboxylic acid	HCID 11206950	—
Reactant	methyl N-{(2R,3R)-3-methoxy-3-[(2S)-1-{(3R,4S,5S)-3-methoxy-5-methyl-4-[methyl(L-valyl)amino]heptanoyl}pyrrolidin-2-yl]-2-methylpropanoyl}-L-phenylalaninate	HCID 86685744	—
Solvent	Dichloromethane	HCID 6344	—
Solvent	Ethyl Acetate	HCID 8857	—
Product	1-(tert-butoxycarbonyl)-2-methyl-L-prolyl-N-{(1S,2R)-4-{(2S)-2-[(1R,2R)-3-{[(1S)-1-benzyl-2-methoxy-2-oxoethyl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidin-1-yl}-2-methoxy-1-[(1S)-1-methylpropyl]4-oxobutyl}-N-methyl-L-valinamide	HCID 86685743	75.1%

Reaction Steps

To a stirring solution of #114 (1.02 g, 1.61 mmol, 1.0 eq.) and 1-(tert-butoxycarbonyl)-2-methyl-L-proline (443 mg, 1.93 mmol, 1.2 eq.) in 12 mL of dichloromethane, HATU (735 mg, 1.93 mmol, 1.2 eq.) was added followed by Hunig's base (1.12 mL, 6.45 mmol, 4.0 eq.). The reaction was allowed to stir at room temperature for 2 hours. The reaction was reduced down, diluted with ethyl acetate before being washed with 0.5 N HCl and brine. Organics where then dried over sodium sulfate, reduced to a smaller volume, and then reduced down on silica. Silica chromatography was then performed (Gradient: 0%-45% acetone in heptanes) producing #116 (1.02 g, 74%) as a white solid. LC-MS (Protocol Q): m/z 844.3 [M+H+], 867.2 [M+Na+], retention time=2.15 minutes.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09138486B2
Source dataset	uspto-grants-2015_09
ORD ID	ord-7c91eb5c6a3d41bdbeff40d1bfbfb52a
Source note	uspto-grants-2015_09