Diisopropylethylamine → (R,E)-1-(3-(4-amino-3-(4-(3-fluorophenoxy)phenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)pyrrolidin-1-yl)-4-(cyclobutyl(methyl)amino)but-2-en-1-one

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	(R)-3-(4-(3-fluorophenoxy)phenyl)-1-(pyrrolidin-3-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine	HCID 71209019	—
Reactant	(E)-4-(cyclobutyl(methyl)amino)but-2-enoic acid hydrochloride	HCID 71209048	—
Solvent	Dimethylformamide	HCID 6228	—
Solvent	Ethyl Acetate	HCID 8857	—
Product	(R,E)-1-(3-(4-amino-3-(4-(3-fluorophenoxy)phenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)pyrrolidin-1-yl)-4-(cyclobutyl(methyl)amino)but-2-en-1-one	HCID 71208320	17.2%

Reaction Steps

To a solution of 4a (134 mg, 0.344 mmol), (E)-4-(cyclobutyl(methyl)amino)but-2-enoic acid hydrochloride (0.344 mmol) and HATU (122 mg, 0.38 mmol) in DMF (1.5 ml) was dropwise added DIPEA (134 mg, 1.032 mmol) at rt. Stirring was continued for 30 min at rt (monitored by HPLC). The reaction mixture was diluted with EA, washed with water and brine, and dried over sodium sulfate. Filtration followed by concentration under reduced pressure provided a residue which was purified by flash chromatography using silica gel (1-12% MeOH/DCM) to give 32 mg of the title compound (4b). MS (ESI) m/e (M+1H)+: 542.1.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09138436B2
Source dataset	uspto-grants-2015_09
ORD ID	ord-1b68c5b88d2c411886d17d40a679da29
Source note	uspto-grants-2015_09