... After the reaction became vigorous, the stirrer was stopped and (25) LT Sandborn, "Organic Syntheses," Coll. Vol. ... pressure. The ester boiled at 123-126' (26 mm.), yielding 95%. (28) J. Cymerman, IM Heilbron, and E. RH Jones. J . Chem. Soc., 144 (1944). ...