F. Toda et al., SOLVENT-FREE DIECKMANN CONDENSATION-REACTIONS OF DIETHYL ADIPATE AND PIMELATE, Journal of the Chemical Society. Perkin transactions. I (Print), (21), 1998, pp. 3521-3522
Dieckmann condensation reactions of diethyl adipate and pimelate proce
eded efficiently in the absence of solvent, and the reaction products
were collected by a direct distillation from the solvent-free reaction
mixture.