The Reformatsky reaction has been examined using a mild and effective method of electrochemical zinc activation, based on the cathodic reduction of a catalytic amount of zinc bromide in acetonitrile.
Synthesis of .alpha.,.alpha.,.beta.,.beta.-Tetrasubstituted .beta.-Lactones from Ketones, Ethyl .alpha.-Bromoisobutyrate, and Indium or Zinc. Factors Influencing the .beta.-Lactone Formation in the Electrochemical and the Classical Procedure of the Reformatsky Reaction
An efficient synthesis of alpha,alpha,beta,beta-tetrasubstituted beta-lactones is achieved by an electrochemically supported Reformatsky reaction of aliphatic and aromatic ketones with ethyl alpha-bromoisobutyrate at a sacrificial indium anode. Under these conditions, in most cases the expected beta-hydroxy esters are formed only in negligible amounts or not at all. beta-Lactones are also obtained with a sacrificial zinc anode or even with indium or zinc powder. The substitution pattern of the reactants, the polarity of the solvent, and the applied metal are recognized as factors influencing the extent of the beta-lactone formation.
Blaise; Courtot, Bulletin de la Societe Chimique de France, 1906, vol. <3> 35, p. 591,597
作者:Blaise、Courtot
DOI:——
日期:——
Berberianu, Chemisches Zentralblatt, 1915, vol. 86, # II, p. 399
作者:Berberianu
DOI:——
日期:——
Migration du groupe éthoxycarbonyle dans la transposition de<i>Wagner-Meerwein</i>
作者:Trung Hieu Phan、Hans Dahn
DOI:10.1002/hlca.19760590137
日期:——
Ethoxycarbonyl group migration in the Wagner-Meerwein rearrangement.