反应 #2930077
相关文献 (1)
openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US09096600B2
反应条件: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: Zinc (0.967 g, 14.8 mmol) was suspended with 1,2-dibromoethane (0.085 mL, 0.98 mmol) in DMF (17 mL). The mixture was heated at 70° C. for 10 min and then cooled to room temperature. Chlorotrimethylsilane (0.13 mL, 0.98 mmol) was added dropwise and stirring was continued for 1 hour. A solution of benzyl 3-iodoazetidine-1-carboxylate (3.9 g, 12 mmol, from Pharmablock) in DMF (10 mL) was then added and the mixture was heated at 40° C. for 1 h before a mixture of 1-(5-chloro-2-ethoxy-3-iodo-4-methylphenyl)ethanone (4.4 g, 13 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.22 g, 0.24 mmol) and tri-(2-furyl)phosphine (0.12 g, 0.50 mmol) in DMF (30 mL) was added. The reaction mixture was warmed to 70° C. and stirred overnight. The mixture was then cooled to room temperature and partitioned between ether and sat. NH4Cl solution. The organic layer was washed with water, dried over MgSO4, concentrated and purified on silica gel (eluting with 0 to 20% EtOAc in hexanes) to give the desired product (3.87 g, 78%). LCMS calculated for C22H25ClNO4 (M+H)+: m/z=402.1. found: 402.1. cooled to room temperature was added The reaction mixture was warmed to 70° C. stirred overnight The mixture was then cooled to room temperature partitioned between ether and sat. NH4Cl solution The organic layer was washed with water dried over MgSO4 concentrated purified on silica gel (eluting with 0 to 20% EtOAc in hexanes)
来源 ID: ord-0e0ac99fac4b441ca06fa8b5ebf786e8