Organocatalytic syn-Aldol Reactions of Dioxanones with (S)-Isoserinal Hydrate: Synthesis of l-Deoxymannojirimycin and l-Deoxyidonojirimycin
摘要:
We report a new protocol for synthesis of L-1-deoxymannojirimycin, L-1-deoxyidonojirimycin, and the N-isopropyl derivative of the latter compound from the readily available precursors (S)-isoserinal hydrate and 2-tert-butyl-2-methyl-1,3-dioxan-5-one. The key steps include diastereoselective proline-catalyzed syn aldol transformation and a reductive amination/cyclization.
Expeditious Racemic and Enantiodivergent Synthesis of 1-Deoxymannojirimycin and 1,4-Dideoxymannojirimycin
作者:Dina Scarpi、Laura Bartali、Andrea Casini、Ernesto G. Occhiato
DOI:10.1002/ejoc.201200022
日期:2012.5
hydroboration/oxidation, for the synthesis of DMJ. Enantiodivergency was attained by optical resolution before exhaustive functional group deprotection, through the formation of diastereomeric camphanic esters. As the key racemic intermediate esters were easily prepared in a few steps on a large scale, and the final chromatographic separation of the camphanic esters was straightforward, this approach
Six-Step Syntheses of (−)-1-Deoxyaltronojirimycin and (+)-1-Deoxymannonojirimycin from <i>N</i>-<i>Z</i>-<i>O</i>-TBDPS-<scp>l</scp>-serinal
作者:Meire Y. Kawamura、Alexánder G. Talero、João V. Santiago、Edson Garambel-Vilca、Isac G. Rosset、Antonio C. B. Burtoloso
DOI:10.1021/acs.joc.6b01575
日期:2016.11.4
Highly stereoselective six-step syntheses of (−)-1-deoxyaltronojirimycin (altro-DNJ) and (+)-1-deoxymannojirimycin (manno-DNJ) from N-Cbz-O-TBDPS-l-serinal are described. Key transformations involve a two-step preparation of a functionalized dihydropyridin-3-one as a common intermediate followed by Luche reduction and dihydroxylation (for altro-DNJ). The same sequence employing an epoxidation/epoxide
A stereoselective procedure for the preparation of non-naturally occurring deoxy iminosugars belonging to L-series has been developed. The synthesis involves the construction of the key intermediate bicycle pyperidine 8, available in few steps by the coupling of the heterocyclic synthon 3 and the readily available Garner aldehyde 4.
FLEET, GEORGE W. J.
作者:FLEET, GEORGE W. J.
DOI:——
日期:——
FLEET, GEORGE W. J.;RAMSDEN, NIGEL G.;WITTY, DAVID R., TETRAHEDRON., 45,(1989) N 1, C. 319-326
作者:FLEET, GEORGE W. J.、RAMSDEN, NIGEL G.、WITTY, DAVID R.