Tri-o-tolylphosphine → 5'-Ethenylspiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyrdine]

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Reaction Steps

A solution containing 5′-bromospiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine] (150 mg, 0.508 mmol), tris(dibenzylidineacetone)dipalladium (0) (22 mg, 0.024 mmol), tri(o-tolyl)phosphine (63 mg, 0.206 mmol), lithium chloride (103 mg, 2.43 mmol), and tri-n-butylvinylstannane (188 mg, 0.592 mmol) in 1,2-dimethoxyethane (10 ml) was heated under reflux overnight. The solution was evaporated, and the residue was taken up in chloroform and filtered. The filtrate was evaporated then purified by HPLC using a gradient of 0-25% 1:1:2 7M methanolic ammonia:methanol:chloroform and chloroform to obtain the title compound (93 mg, 0.385 mmol, 76%) as a pale solid: electrospray MS (m/z, relative intensity) 243 ([MH]+, 100).

Provenance & Evidence