Diisopropylethylamine → (2S,4R)-methyl 1-((2S,3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylate

Participants

Role	Name	HCID	Charge
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	(4R)-4-Hydroxy-L-proline methyl ester	HCID 7015125	—
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	(3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoic acid	HCID 86683261	—
Solvent	Dichloromethane	HCID 6344	—
Product	(2S,4R)-methyl 1-((2S,3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylate	HCID 86683260	—

Reaction Steps

To a solution of (3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoic acid (2 g, 6.38 mmole) in dichloromethane (20 mL) was added DIPEA (1.93 mL, 19.19 mmole), HATU (2.42 g, 6.38 mmole) followed by (2S,4R)-methyl 4-hydroxypyrrolidine-2-carboxylate (1.15 g, 6.38 mmole) at room temperature. The reaction mixture was stirred at room temperature for 2 h. The reaction mass was diluted with DCM and washed with water. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure to get crude compound. The crude compound was taken to the next step without further purification (1.5 g, 53.4%). MS: MS m/z 441.6 (M++1)

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08957203B2
Source dataset	uspto-grants-2015_02
ORD ID	ord-d9226276fdb4432091b80cb0dc1d0032
Source note	uspto-grants-2015_02