Cyclobutylamine → 6-chloro-4'-[5-chloro-2-(1-cyclobutylcarbamoyl-1-methyl-ethoxy)-phenyl]-2'-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione

Participants

Role	Name	HCID	Charge
Reactant	Cyclobutylamine	HCID 75645	—
Reactant	1-Hydroxybenzotriazole	HCID 75771	—
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride	HCID 2723939	—
Reactant	6-chloro-4'-[5-chloro-2-(2-hydroxy-1,1-dimethyl-ethoxy)phenyl]-2'-[5-fluoro-2-methylphenyl]spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione	HCID 76567885	—
Solvent	Tetrahydrofuran	HCID 8028	—
Product	6-chloro-4'-[5-chloro-2-(1-cyclobutylcarbamoyl-1-methyl-ethoxy)-phenyl]-2'-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione	HCID 74928684	42.7%

Reaction Steps

To a mixture of racemic (2′S,3S,4′R)-6-chloro-4′-[5-chloro-2-(2-hydroxy-1,1-dimethyl-ethoxy)-phenyl]-2′-[5-fluoro-2-methylphenyl]-spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (35 mg, 0.06 mmol), EDCl (18 mg, 0.094 mmol), HOBt (14 mg, 0.094 mmol) and DIPEA (23 mg, 0.2 mmol) in THF (1 mL) was added cyclobutylamine (13 mg, 0.18 mmol). The mixture was stirred at room temperature overnight, purified by prep-HPLC to give the title compound as a white solid (16 mg).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US07776875B2
Source dataset	uspto-grants-2010_08
ORD ID	ord-ea27b4d834b343b4b7b216237eec1577
Source note	uspto-grants-2010_08