Microwave-assisted efficient synthesis of azlactones using zeolite NaY as a reusable heterogeneous catalyst
作者:Mohammad Ali Bodaghifard、Hassan Moghanian、Akbar Mobinikhaledi、Fatemeh Esmaeilzadeh
DOI:10.1080/15533174.2016.1212242
日期:2017.6.3
azlactones in the presence of zeolite NaY has been reported. This heterogeneouscatalyst was used for efficient synthesis of azlactone derivatives with Ac2O as a condensing agent under microwave irradiation and solvent-free conditions. The present method offers the advantages of good yields, short reaction time, simple work-up, and catalystreusability, which makes this method mild and eco-friendly.
LAWRENZ, D.;MOHR, S.;WENDLAENDER, B., J. CHEM. SOC. CHEM. COMMUN., 1984, N 13, 863-865
作者:LAWRENZ, D.、MOHR, S.、WENDLAENDER, B.
DOI:——
日期:——
Synthesis and conformational properties of model dipeptides containing novel axially chiral α,β-didehydroamino acids at the (i+1) position of a β-turn conformation
作者:Carlos Cativiela、María D. Díaz-de-Villegas、José A. Gálvez、Guifa Su
DOI:10.1016/j.tet.2004.09.066
日期:2004.12
βII′-turn conformation. Axially chiral α,β-didehydroamino acids (Ra)- and (Sa)-4-methyl-, 4-phenyl- and (4-tert-butylcyclohexylidene)glycine can be considered as elongated structural analogues of alanine, phenylglycine and tert-leucine of R and S configuration since, in these chiral α,β-didehydroamino acids, the methyl, phenyl and tert-butyl groups are located about 4.3 Å away from the peptide backbone
Formation of 1,3-diazetidines via C–N dimerization of 4-cycloalkylidene-oxazol-5(4H)-ones in the solid state
作者:Dirk Lawrenz、Siegfried Mohr、Birgit Wendländer
DOI:10.1039/c39840000863
日期:——
Various 4-cycloalklidene-oxazol-5(4H)-ones have been observed to photodimerize in the solidstatevia an uncommon C–N cycloaddition to give centrosymmetric 1,3-diazetidines in very high yields.