The reaction of enols with superoxide anion radical [02???]1. Synthesis of 2,3-unsaturated-δ-valerolactones.
作者:Aryeh A. Frimer、Pessia Gilinsky-Sharon、Gladis Aljadeff
DOI:10.1016/s0040-4039(00)87089-6
日期:1982.1
4-Hydroxycoumarin ( and ) as well as 2-hydroxy-2,5-cyclohexadien-1-ones – were reacted with KO2/18-crown-6 in benzene. Initial deprotonation of the enol hydrogen was followed by nucleophilic attack by O2/t- (for and ) and/or autoxidation of the resulting anion (for and –). A convenient synthesis of 2,3-unsaturated-δ-valerolactones from the corresponding 2-cyclohexen-1-ones is also described.
FRIMER A. A.; ALJADEFF G.; GILINSKY-SHARON P., ISR. J. CHEM., 27,(1986) N 1, 39-44
作者:FRIMER A. A.、 ALJADEFF G.、 GILINSKY-SHARON P.
DOI:——
日期:——
Beta-substituierte Zimtsäurederivate
申请人:BASF Aktiengesellschaft
公开号:EP0525516B1
公开(公告)日:1995-09-27
Alkoxide-catalyzed addition of alkyl carbonates across alkynes – stereoselective synthesis of (E)-β-alkoxyacrylates
作者:Timo Wendling、Eugen Risto、Benjamin Erb、Lukas J. Gooßen
DOI:10.1039/c6gc03168d
日期:——
Dialkyl carbonates were found to regio- and stereoselectively add to terminal alkynes in the presence of catalytic amounts of potassium methoxide. Various synthetically meaningful aryl- and heteroaryl-substituted (E)-[small beta]-alkoxyacrylates were thus...