prov:value
| - reaction-inert solvent such as, for example, a hydrocarbon, e.g. hexane, heptane, cyclohexane and the like; an aromatic hydrocarbon, e.g. benzene, methylbenzene and the like; an ether, e.g. 1,1'-oxybisethane, tetrahydrofuran, 1,2-dimethoxyethane and the like; a dipolar aprotic solvent, e.g. dimethylsulfoxide, hexamethylphosphor triamide and the like solvents; and subsequently treating the thus ob
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