Regioselective Synthesis of Nitrones by Decarboxylative Oxidation of<i>N</i>-Alkyl-<i>α</i>-amino Acids and Application to the Synthesis of 1-Azabicyclic Alkaloids
were prepared by catalytic oxidation of the corresponding chiral pyrrolidines in a regioselective manner. These chiral cyclic nitrones, 17 and 45 are versatile intermediates for the synthesis of optically active nitrogen heterocycles, since stereoselective additions of carbon nucleophiles to these chiral nitrones can be readily performed. Typically, ZnI2-mediated addition of ketene t-butyldimethylsilyl
A nitrone cycloaddition to a 1,4-disubstituted-buta-1,3-diene. A synthesis of 5-(3-furyl)-8-methyl-octahydroindolizine
作者:Joseph J. Tufariello、Andrew D. Dyszlewski
DOI:10.1039/c39870001138
日期:——
A new nitrone-based synthesis of the Nuphar indolizidine 5-(3-furyl)-8-methyloctahydroindolizine was accomplished by a regiospecific cycloaddition of a nitrone with a 1,4-disubstituted butadiene.
Isoxazoline oxidation. An efficient method for the preparation of α,β-unsaturated carbonyl compounds
作者:Albert Padwa、Donald N. Kline、John Perumattam
DOI:10.1016/s0040-4039(00)95872-6
日期:1987.1
MCPBA peracidoxidation of Δ4-isoxazolines derived from the dipolar cycloaddition reaction of nitrones with acetylenes or allenes produces α,β-unsaturated ketones in excellent yield.
Diastereofacial selectivity in intermolecular nitrone cycloadditions to chiral allyl ethers. Application to Chiral Synthesis of Coniine
作者:Masayuki Ito、Masae Maeda、Chihiro Kibayashi
DOI:10.1016/0040-4039(92)80019-g
日期:1992.6
The intermolecular cycloadditions of a cyclic nitrone to chiral allyl ethers take place with erythro selectivity, where the degree of selectivity achieved is dependent upon the size of the alkyl substituent attached to the allylic chiral center, and these reactions are applied to the synthesis of optically active alkaloid coniine.