反应详情

The product of Step 2 (200 mg, 0.47 mmol), cis-1,2,6-trimethyl piperazine (118 mg, 0.94 mmol), sodium tert-butoxide (90 mg, 0.94 mmol), tris(dibenzylideneacetone)dipalladium(0) (22 mg, 0.024 mmol) and 2-dicyclohexylphosphino-2′-(N,N-dimethylamino)biphenyl (28 mg, 0.071 mmol) in dioxane (10 ml) was heated at reflux for 16 hours. After cooling to room temperature the solution was concentrated in vacuo. The residue was applied to an SCX ion exchange cartridge (Varian bond-elute) and washed with methanol and 2M ammonia in methanol. The combined basic fractions were concentrated in vacuo and the residue purified by mass directed autoprep to afford the title product (E277). MS (ES+) 472 [M+H]+.

1. temperatureat reflux for 16 hours
2. concentrationwas concentrated in vacuo
3. washThe residue was applied to an SCX ion exchange cartridge (Varian bond-elute)
4. washwashed with methanol and 2M ammonia in methanol
5. concentrationThe combined basic fractions were concentrated in vacuo
6. customthe residue purified by mass