Preparation and Synthetic Applications of Enantiopure (2S,3S)- or (2R,3S)-2-Halomethyl-1,2-epoxyalkan-3-amines
摘要:
Enantiomerically pure (2S,3S)-3 and its diastereoisomer (2R,3S)-2-halomethyl-1,2-epoxyalkan-3-amine 4 have been obtained from 1-aminoalkyl halomethyl ketones 1 and (iodomethyl)lithium or (chloromethyl)lithium, respectively. Some synthetic applications of compounds 3 are described: chiral unsaturated 1,3-aminoalcohols 8 or 2-(halomethylidene)-3-(dibenzylamino)-alkan-1-ol 11 is obtained from 3 by halogeno-lithium or by hydrogen-lithium exchange, respectively. Transformation of 8c into its methyl ester derivative 9c is also reported.
Preparation and Synthetic Applications of Enantiopure (2<i>S</i>,3<i>S</i>)- or (2<i>R</i>,3<i>S</i>)-2-Halomethyl-1,2-epoxyalkan-3-amines
作者:José Barluenga、Beatriz Baragaña、José M. Concellón
DOI:10.1021/jo9823590
日期:1999.4.1
Enantiomerically pure (2S,3S)-3 and its diastereoisomer (2R,3S)-2-halomethyl-1,2-epoxyalkan-3-amine 4 have been obtained from 1-aminoalkyl halomethyl ketones 1 and (iodomethyl)lithium or (chloromethyl)lithium, respectively. Some synthetic applications of compounds 3 are described: chiral unsaturated 1,3-aminoalcohols 8 or 2-(halomethylidene)-3-(dibenzylamino)-alkan-1-ol 11 is obtained from 3 by halogeno-lithium or by hydrogen-lithium exchange, respectively. Transformation of 8c into its methyl ester derivative 9c is also reported.
Synthesis of Enantiopure α‘-Amino α,β-Epoxy Ketones from α‘-Amino Bromomethyl Ketones
作者:José Barluenga、Beatriz Baragaña、José M. Concellón、Alejandro Piñera-Nicolás、M. Rosario Díaz、Santiago García-Granda
DOI:10.1021/jo982435z
日期:1999.7.1
Preparation of enantiomerically pure α'-amino α,β-epoxyketones 2 in an efficient synthesis starting from α'-amino bromomethyl ketones 5 and the obtention of amino diepoxido 10a as synthetic application of 2 are described. We also report the generalization of the synthesis of 1-aminoalkyl halomethyl ketones to their bromo derivatives.