The stereoselectivetotalsynthesis of (−)-galantinic acid 1 and 1-deoxy-5-hydroxysphingolipids 4 is described via Prins cyclization protocol followed by reductive ring opening sequence of substituted pyrenol derivative 6. The target molecules were synthesized using a common synthetic intermediate epoxide 5. Besides, we also proposed synthetic pathways to achieve other structural analogues using common
Stereoselective Synthesis of the C(1) - C(28) Fragment of Amphidinol 3
作者:Jhillu S. Yadav、Yerragorla Gopalarao、Dandekar Chandrakanth、Basi V. Subba Reddy
DOI:10.1002/hlca.201500281
日期:2016.6
A stereoselective synthesis of the polyol side chain (C(1) – C(28)) of amphidinol 3 has been accomplished following Sharplessepoxidation, Crimmins aldol reaction, Jacobsen kineticresolution, Sharpless asymmetric dihydroxylation, and our own reaction for the synthesis of a chiral allylic alcohol from an epoxy alcohol. The olefin functionality was introduced by a cross metathesis and Julia–Kocienski
A practical stereoselectivetotalsynthesis of (3R,5R)-5-hydroxy-de-O-methyllasiodiplodin has been accomplished viaPrinscyclization. It exhibits potato microtuber inducing activity. The synthetic sequence involves Prinscyclization, reductive opening of the pyran ring, esterification, and ring-closing metathesis (RCM) as the key steps. Prinscyclization - ring-closing metathesis - esterification
Stereoselective Synthesis of <i>anti</i>-1,3-Aminoalcohols <i>via</i> Reductive Opening of 4-Amidotetrahydropyrans Derived from the Prins/Ritter Sequence
作者:J. S. Yadav、Y. Jayasudhan Reddy、P. Adi Narayana Reddy、B. V. Subba Reddy
DOI:10.1021/ol303364j
日期:2013.2.1
A novel method has been devised for anti-1,3-aminoalcohols through reductive elimination of iodomethyltetrahydropyrans which are in turn derivedfrom a Prins/Ritter reaction sequence. The synthetic versatility of this method has been explored in the total synthesis of piperidine alkaloids and β-amino acids.
scope of the Prins cyclisation, the higher stereoselectivesynthesis of multisubstituted tetrahydropyransfrom aldehydes and homoallylic alcohols, is expanded. A new approach for the stereoselectivesynthesis of polyketide precursors containing anti-1,3-diols, flanked by a variety of alkyl branches and functional groups is described. The approach is successfully exploited for the synthesis of (−)-sedamine