Tetramethyltin → 5'-Methylspiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyridine]

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution containing 5′-bromospiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine] (203 mg, 0.687 mmol), tris(dibenzylidineacetone)dipalladium (0) (33 mg, 0.036 mmol), tri(o-tolyl)phosphine (95 mg, 0.312 mmol), lithium chloride (241 mg, 5.69 mmol), and tetramethylstannane (1.0 ml, 1.3 g, 7.2 mmol) in 2-methoxyethyl ether (5 ml) was heated in a bath maintained at 100° C. After 3 h, a further portion of tetramethylstannane (1 ml, 1.3 g, 7.2 mmol) was added, and heating was continued overnight. The solution was filtered, and subjected to purification by HPLC using a gradient of 0-20% 1:1:2 7M methanolic ammonia:methanol:chloroform and chloroform to obtain the title compound (120 mg, 0.519 mmol, 76%) as a pale solid: electrospray MS (m/z, relative intensity) 231 ([MH]+, 100).

Herkunft & Nachweise