It was found that the reaction of O-silylated enolates of carboxylicesters and of lactones with aminomethyl ethers proceeds smoothly under a catalytic action of zinc chloride to afford the corresponding α-aminomethylated carboxylicesters or lactones, except only one case using O-silylated enolate of δ-valerolactone, in which the resultant α-aminomethyl-δ-valerolactone is somewhat unstable and undergoes
LiCl-promoted amination of β-methoxy amides (γ-lactones)
作者:Ru Zhao、Bing-Lin Zeng、Wen-Qiang Jia、Hong-Yi Zhao、Long-Ying Shen、Xiao-Jian Wang、Xian-Dao Pan
DOI:10.1039/d0ra07170f
日期:——
An efficient and mild method has been developed for the amination of β-methoxy amides (γ-lactones) including natural products michelolide, costunolide and parthenolide derivatives by using lithium chloride in good yields. This reaction is applicable to a wide range of substrates with good functional group tolerance. Mechanism studies show that the reactions undergo a LiCl promoted MeOH elimination
Active metals from potassium-graphite. Zinc-graphite promoted synthesis of .beta.-hydroxy esters, homoallylic alcohols and .alpha.-methylene-.gamma.-butyrolactones
作者:Gian Paolo Boldrini、Diego Savoia、Emilio Tagliavini、Claudio Trombini、Achille Umani-Ronchi
DOI:10.1021/jo00170a049
日期:1983.11
BOLDRINI, G. P.;SAVOIA, D.;TAGLIAVINI, E.;TROMBINI, C.;UMANI-RONCHI, A., J. ORG. CHEM., 1983, 48, N 22, 4108-4111
作者:BOLDRINI, G. P.、SAVOIA, D.、TAGLIAVINI, E.、TROMBINI, C.、UMANI-RONCHI, A.
DOI:——
日期:——
FRISTAD, W. E.;PETERSON, J. R.;ERNST, A. B., J. ORG. CHEM., 1985, 50, N 17, 3143-3148