A Convenient Method for the Preparation of Methyl<i>trans</i>-4-Oxo-2-alkenoates
作者:O. G. Kulinkovich、I. G. Tischenko、J. N. Romashin、L. N. Savitskaya
DOI:10.1055/s-1986-31640
日期:——
Methyl trans-4-oxo-2-alkenoates are synthesized in 64-93% yields by successive treatment of 5-substituted 2,2-dimethoxy-2,3-dihydrofurans with N-bromosuccinimide in aqueous acetone and triethylamine in ether.
A New Convenient Synthesis of Methyl 4-Oxoalkanoates
作者:Oleg G. Kulinkovich、Victor L. Sorokin
DOI:10.1055/s-1994-25474
日期:——
Methyl 4-oxoalkanoates have been obtained in good yields by treatment of 1, 2-dichloro-2-alken-4-ones with sodium carbonate in methanol followed by acid-catalyzed hydrolysis of the intermediate 5-alkyl-2,2-dimethoxy-2, 3-dihydrofurans.