Diisopropylethylamine → HCID 86701003, compound

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,5R)-6-(Benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid	HCID 57389355	—
Reactant	4-[[(1,1-dimethylethoxy)carbonyl]amino]Butanoic acid hydrazide	HCID 57829537	—
Solvent	Dichloromethane	HCID 6344	—
Product	HCID 86701003	HCID 86701003	93.3%

Reaction Steps

To a 0° C. solution of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carboxylic acid (12.0 g, 43.5 mmol) and tert-butyl 4-hydrazinyl-4-oxobutylcarbamate (10.5 g, 47.8 mmol) in CH2Cl2 (360 mL) was added HATU (19.6 g, 52.2 mmol) and DIPEA (16.6 g, 130.5 mmol). The mixture was allowed to warm to rt, was stirred at rt for 12 hrs then diluted with CH2Cl2 (300 mL), washed with water (2×) and saturated sodium chloride (2×), dried over Na2SO4, and concentrated. The residue was purified by silica gel column chromatography (gradient elution 50˜80% EtOAc/petroleum ether) to afford tert-butyl 4-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-4-oxobutylcarbamate (19.3 g, 93%) as a white solid. ESI-MS (EI+, m/z): 476 [M+H]+.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08962843B2
Source dataset	uspto-grants-2015_02
ORD ID	ord-286ad88768d84dc6a7a1969b912b4a03
Source note	uspto-grants-2015_02