Lactones of the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or an alkyl group and n represents an integer of 0 to 10, are produced by reacting a diol, formaldehyde and carbon monoxide in the presence of copper (I) or silver carbonyl complex catalyst in a strong acid.
Palomaa; Toukola, Chemische Berichte, 1933, vol. 66, p. 1629,1632
作者:Palomaa、Toukola
DOI:——
日期:——
A Simple and Efficient Synthesis of 1,4- and 1,5-Dioxepan-2-one
作者:Ali Hassannia、Graeme Piercy、Nabyl Merbouh
DOI:10.2174/157017809789124849
日期:2009.9.1
A novel synthesis of 1,4- and 1,5-dioxepan-2-one lactones was achieved through the regioselective oxidation of 3-(2-hydroxyethoxy)propan-1-ol. Under basic conditions, when 3-(2-hydroxyethoxy)propan-1-ol was oxidized using oxoammonium salts, a quantitative oxidative esterification was observed, resulting in a regioselective lactone ring closure. This oxidation was tailored to afford 1,4-dioxepan-2-one in very good yield.