Multi-step reaction with 8 steps
1: 1.) potassium hydride, 2.) tetrabutylammonium iodide / 1.) hexane, THF, from 0 deg C to RT, 40 min, 2.) hexane, THF, overnight
2: 72 percent / pyridinium chlorochromate (PCC), Celite / CH2Cl2 / 1.5 h / Ambient temperature
4: 94 percent / dichlorodicyanobenzoquinone (DDQ), water / CH2Cl2 / 0.75 h
5: 84 percent / DMSO, oxalyl chloride / CH2Cl2 / 0.25 h
6: piperidine / acetonitrile / 1 h / Ambient temperature
7: 94 percent / DMSO, oxalyl chloride / CH2Cl2 / 0.25 h / -78 °C
8: 67 percent / calcium carbonate / CCl4 / 2 h / Irradiation
With
piperidine; oxalyl dichloride; Celite; water; tetra-(n-butyl)ammonium iodide; potassium hydride; dimethyl sulfoxide; pyridinium chlorochromate; 2,3-dicyano-5,6-dichloro-p-benzoquinone; calcium carbonate;
In
tetrachloromethane; dichloromethane; acetonitrile;
DOI:10.1021/ja00019a036