Diethyl Ether → tert-butyl (3aS,6aS)-5-(5-methoxy-3-pyridinyl)hexahydropyrrolo[3,4-b]pyrrole-1(2H)-carboxylate

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Reaction Conditions

Reaction Steps

The product from Example 15E (0.549 g, 2.30 mmol) in toluene (23 mL) was treated with tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3, available from Alfa Aesar) (43 mg, 0.10 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP, available from Strem Chemicals) (58 mg, 0.10 mmol), 3-bromo-5-methoxypyridine from Example 7A (0.43 g, 2.30 mmol) and sodium tert-butoxide (available from Aldrich Chemical Co.,) (0.38 g, 3.90 mmol). After heating at 80° C. for 16 hours, the mixture was poured into diethyl ether (100 mL), washed with brine (100 mL), dried (MgSO4) and concentrated under reduced pressure. The residue was purified by chromatography (SiO2, 5% MeOH/CH2Cl2) to provide the title compound as a yellow oil (0.42 g, 57% yield). MS (DCI/NH3) m/z 320 (M+H)+.

Provenance & Evidence