Cesium carbonate → 3-Bromo-5-{4,4-dimethyl-9-oxo-7-thia-10-azatricyclo[6.4.0.02,6]dodeca-1(8), 2(6)-dien-10-yl}pyridine-4-carbaldehyde

Participants

Role	Name	HCID	Charge
Reactant	Cesium carbonate	HCID 10796	—
Reactant	1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)	HCID 636044	—
Reactant	3,5-Dibromo-4-pyridinecarboxaldehyde	HCID 2762998	—
Reactant	6,6-Dimethyl-2,3,4,5,6,7-hexahydro-1H-cyclopenta[4,5]thieno[2,3-c]pyridin-1-one	HCID 58043895	—
Catalyst	Bis(dibenzylideneacetone)palladium	HCID 9811564	—
Solvent	1,4-Dioxane	HCID 31275	—
Product	3-Bromo-5-{4,4-dimethyl-9-oxo-7-thia-10-azatricyclo[6.4.0.02,6]dodeca-1(8), 2(6)-dien-10-yl}pyridine-4-carbaldehyde	HCID 86684177	65%

Reaction Conditions

Temperature	100 °C

Reaction Steps

To a 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and reflux condenser was charged with 1,4-dioxane (15 mL), 3,5-dibromoisonicotin-aldehyde (400 mg, 1.5 mmol), 4,4-dimethyl-7-thia-10-azatricyclo[6.4.0.02,6]dodeca-1(8),2(6)-dien-9-one (106h) (170 mg, 0.76 mmol), and cesium carbonate (176 mg, 1.5 mmol). Xantphos (40 mg, 0.08 mmol) and Pd2(dba)3 (70 mg, 0.08 mmol) were added, and the reaction mixture was heated at 100° C. for 5 h. After this time the reaction was cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the residue was purified on flash column eluting with DCM:MeOH (20:1) to afford 106i (200 mg, 65%). MS: [M+H]+ 405.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09238655B2
Source dataset	uspto-grants-2016_01
ORD ID	ord-d645b2c2d7c84144918a77d4c7f64628
Source note	uspto-grants-2016_01