“Click, Click, Cyclize”: A DOS Approach to Sultams Utilizing Vinyl Sulfonamide Linchpins
作者:Aihua Zhou、Dinesh Rayabarapu、Paul R. Hanson
DOI:10.1021/ol802467f
日期:2009.2.5
A diversity-oriented synthesis (DOS) strategy termed “Click, Click, Cyclize” is reported. This approach relies on functional group (FG) pairing between a vinyl sulfonamide and an array of functional groups to synthesize skeletally diverse sultams. Several FG pairing pathways on central tertiary vinyl sulfonamide linchpins have been developed including intramolecularHeck, aza-Michael, ring-closing
Synthesis of <scp>l</scp>-<i>altro</i>-1-Deoxynojirimycin, <scp>d</scp>-<i>allo-</i>1-Deoxynojirimycin, and <scp>d</scp>-<i>galacto-</i>1-Deoxynojirimycin from a Single Chiral Cyanohydrin
作者:Adrianus M. C. H. van den Nieuwendijk、Mark Ruben、Sander E. Engelsma、Martijn D. P. Risseeuw、Richard J. B. H. N. van den Berg、Rolf G. Boot、Johannes M. Aerts、Johannes Brussee、Gijs A. van der Marel、Herman S. Overkleeft
DOI:10.1021/ol101556k
日期:2010.9.3
The chemoenzymatic synthesis of three 1-deoxynojirimycin-type iminosugars is reported. Key steps in the synthetic scheme include a Dibal reduction−transimination−sodium borohydride reduction cascade of reactions on an enantiomerically pure cyanohydrin, itself prepared employing almond hydroxynitrile lyase (paHNL) as the common precursor. Ensuing ring-closing metathesis and Upjohn dihydroxylation afford
Synthesis of Eight 1-Deoxynojirimycin Isomers from a Single Chiral Cyanohydrin
作者:Adrianus M. C. H. van den Nieuwendijk、Richard J. B. H. N. van den Berg、Mark Ruben、Martin D. Witte、Johannes Brussee、Rolf G. Boot、Gijsbert A. van der Marel、Johannes M. F. G. Aerts、Herman S. Overkleeft
DOI:10.1002/ejoc.201200377
日期:2012.6
configurational 1-deoxynojirimycin isomers have been synthesized starting from a chiral cyanohydrin as the common precursor. The cyanohydrin chiral pool building block is easily accessible in large quantities by using almond hydroxynitrile lyase as the chiral catalyst in condensing hydrogen cyanide and crotonaldehyde. Our work complements the large body of literature on the synthesis of 1-deoxynojirimycin derivatives
Synthesis of enantiomerically pure (+)- and (−)-protected 5-aminomethyl-1,3-oxazolidin-2-one derivatives from allylamine and carbon dioxide
作者:Isabelle Fernández、Luis Muñoz
DOI:10.1016/j.tetasy.2006.08.006
日期:2006.10
The stereoselective synthesis of enantiomerically pure (5R)- and (5S)-aminomethyl-oxazolidinones with different protecting groups have been carried out from an allyl amine as the source of the carbon backbone. The key reaction is the high yield iodiocyclization of enantiomerically pure allylphenethyl amine in the presence of carbon dioxide. (c) 2006 Elsevier Ltd. All rights reserved.