反应详情

A solution of oxalyl chloride in CH2Cl2 (2 M, 1.6 mL, 3.2 mmol) was added dropwise to a solution of 6-cyano-1-methyl-1H-indole (360 mg, 2.3 mmol) in ether (5 mL). Stirring was continued for 30 min at 0° C. and the cooling bath was removed. After 2 h, more of the 2 M solution of oxalyl chloride (0.2 mL, 0.4 mmol.) was added. Stirring was continued at room temperature for additional 2 h. The solid was filtered and washed with ether to give (6-cyano-1-methyl-1H-indol-3-yl)glyoxylyl chloride (450 mg, 79%). Ref:: Troxler, F.; Hamisch, A.; Bormann, G.; Seemann, F.; Szabo, L.; Helv. Chim Acta, 1968, 51(1), 1616.

1. customthe cooling bath was removed
2. waitAfter 2 h
3. stirringStirring
4. waitwas continued at room temperature for additional 2 h
5. filtrationThe solid was filtered
6. washwashed with ether