反应详情

The carboxylic acid from Example 12 (0.5 g, 1.25 mol) in dichloromethane (10 ml) was treated with oxalyl chloride (6.3 ml, 3.4 mmol) and DMF (catalytic). The solution was stirred for 1 hour and evaporated to dryness. The residue in dry THF (5 ml) was added to a stirred solution of triethylamine (0.3 ml, 4 mmol) and N-Ethyl-2-aminomethyl pyrrolidine (0.57 g, 4.5 mmol). After 3 hours at room temperature the solution was partitioned (EtOAc/H2O). Drying and removal of organics followed by rexst (EtOAc/60°-80° C. petrol) afforded the title compound as a white powder, m.pt. 174°-175° C.

1. customevaporated to dryness
2. customAfter 3 hours at room temperature the solution was partitioned (EtOAc/H2O)
3. customDrying
4. customremoval
5. customof organics followed by rexst (EtOAc/60°-80° C. petrol)