Diisopropylethylamine → N-(2-(5-chloro-1H-indol-3-yl)ethyl)-5-(4-(trifluoromethoxy)benzyl)-1,2,4-oxadiazole-3-carboxamide

Participants

Role	Name	HCID	Charge
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	5-Chloro-1H-indole-3-ethylamine monohydrochloride	HCID 2827494	—
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	Ethyl 5-(4-(trifluoromethoxy)benzyl)-1,2,4-oxadiazole-3-carboxylate	HCID 66832172	—
Solvent	Water	HCID 962	—
Solvent	Dimethylformamide	HCID 6228	—
Solvent	Tetrahydrofuran	HCID 8028	—
Solvent	Sodium Hydroxide	HCID 14798	—
Product	N-(2-(5-chloro-1H-indol-3-yl)ethyl)-5-(4-(trifluoromethoxy)benzyl)-1,2,4-oxadiazole-3-carboxamide	HCID 66831883	36.5%

Reaction Steps

This compound was prepared according to method F with ethyl 5-(4-(trifluoromethoxy)benzyl)-1,2,4-oxadiazole-3-carboxylate (0.109 g; 0.346 mmol) in THF (1 mL) and sodium hydroxide in water (2M, 1 mL); and 2-(5-chloro-1H-indol-3-yl)ethanamine hydrochloride (0.080 g; 0.346 mmol), HATU (0.131 g; 0.346 mmol), N,N diisopropylethylamine (0.149 mL; 0.865 mmol), in DMF (4 mL). The crude mixture was purified by flash chromatography on silica (eluent 20 to 100% ethyl acetate in heptane) to yield 0.0587 g (36%) of N-(2-(5-chloro-1H-indol-3-yl)ethyl)-5-(4-(trifluoromethoxy)benzyl)-1,2,4-oxadiazole-3-carboxamide as a white solid.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09434722B2
Source dataset	uspto-grants-2016_09
ORD ID	ord-7a05f93d2f6c47569ae79dfd36d2b24d
Source note	uspto-grants-2016_09