References
- Shaw , K. B. 1965 . Can. J. Chem. , 43 : 3112
- Barriere , J. , Cotret , C. and Paris , J. Eur. Pat. Appl., EP . 248,703 . 1987 . CA 110:193404f (1989)
- The Kjedahl flask was obtained from an unknown manufacturer but appears to be the same as the Wheaton pressure bottle and stopper assembly (mfr. no. 223077) with rated pressure capability of 150 psi. In a separate experiment, the quinuclidinone and hydrogen sulfide in isopropanol were reacted in the described proportions in a 250 mL glass-lined steel bomb equipped with pressure gauge. Maximum pressure observed after 20 min at 40° was 77 psi. Since the experimental pressures are sufficiently close to the pressure limits of the vessel, increasing the scale of this reaction is not recommended with this flask