Cesium carbonate → 2-Chloro-4-{4,4-dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}pyridine-3-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	4-Bromo-2-chloropyridine-3-carbaldehyde	HCID 53485226	—
Reactant	7,7-dimethyl-3,4,7,8-tetrahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-1(6H)-one	HCID 58044202	—
Catalyst	Bis(dibenzylideneacetone)palladium	HCID 9811564	—
Solvent	1,4-Dioxane	HCID 31275	—
Product	2-Chloro-4-{4,4-dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}pyridine-3-carbaldehyde	HCID 86684593	65%

Reaction Conditions

Temperature	97 °C

Reaction Steps

A 100-mL round-bottomed flask equipped with a reflux condenser was charged with 4,4-dimethyl-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-9-one 107e (612 mg, 3.0 mmol), 4-bromo-2-chloronicotinaldehyde (2.0 g, 9.0 mmol), Pd2(dba)3 (275 mg, 0.30 mmol), XantPhos (347 mg, 0.60 mmol), cesium carbonate (1.95 g, 6.0 mmol), and 1,4-dioxane (30 mL). After three cycles of vacuum/nitrogen flush, the mixture was heated at 97° C. overnight. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was purified by silica-gel column chromatography eluting with 1:2 ethyl acetate/petroleum ether to afford 329a as a yellow solid (660 mg, 65%). MS-ESI: [M+H]+ 344.1.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09238655B2
Source dataset	uspto-grants-2016_01
ORD ID	ord-4032d2fa0f2f4f2e98624dfdac4dabdb
Source note	uspto-grants-2016_01