Ammonium Chloride → 9-Bromo-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxamide

Participants

Role	Name	HCID	Charge
Reactant	Ammonium Chloride	HCID 25517	—
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	9-Bromo-4,5-dihydrobenzo[2,3]oxepino[4,5-D]thiazole-2-carboxylic acid	HCID 58203937	—
Solvent	Tetrahydrofuran	HCID 8028	—
Solvent	Ethyl Acetate	HCID 8857	—
Solvent	Sodium Bicarbonate	HCID 516892	—
Product	9-Bromo-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxamide	HCID 58203902	—

Reaction Steps

To 9-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (2.13 g, 6.53 mmol) in THF (22 mL) was added ammonium chloride (1.40 g, 26.1 mmol), DIEA (2.27 mL, 13.1 mmol), and then HATU (2.73 g, 7.18 mmol). The reaction mixture was allowed to stir at room temperature for 16 h. The reaction mixture was diluted with sodium bicarbonate and ethyl acetate. The mixture was filtered and the filtrate was extracted with EtOAc. The combined organic extracts were washed with water, brine, dried over MgSO4, filtered, and concentrated under reduced pressure to give 9-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid amide (2.12, quantitative yield). LC/MS (ESI+): m/z 327 (M+H)

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08952043B2
Source dataset	uspto-grants-2015_02
ORD ID	ord-efae64a982c045a7a6ccae4c55bb01f0
Source note	uspto-grants-2015_02