C-Glycosyl Tyrosines. Synthesis and Incorporation into <i>C</i>-Glycopeptides
作者:Alan J. Pearce、Sharn Ramaya、Simon N. Thorn、Graham B. Bloomberg、Daryl S. Walter、Timothy Gallagher
DOI:10.1021/jo990253e
日期:1999.7.1
The synthesis of the Fmoc-protected C-glycosyl tyrosines 1 and 2, together with two other related C-glycosyl tyrosines, has been achieved. Key reactions involved (i) the reaction of a glycal with an organozinc reagent (carrying an aryliodide function) in the presence of a Lewis acid to establish the C-glycosyl linkage and (ii) subsequent crosscoupling of the aryliodide to an alanyl zinc reagent
[EN] TRANSACETALISATION PROCESS<br/>[FR] METHODE DE TRANSACETALISATION
申请人:UNIV MONASH
公开号:WO2005070911A1
公开(公告)日:2005-08-04
The invention relates to the resolution of racemic mixtures, and in particular to the separation of enantiomers of chiral alcohols utilising recyclable chiral auxiliaries. The present invention also relates to a process for preparing these recyclable chiral auxiliaries using an enantiomerically pure alcohol.
Iodosobenzene diacetate-Iodine and IBX-Iodine: Reagent systems for the synthesis of diastereomerically enriched 2-deoxy-2-iodoglycosyl acetates and 2-deoxy-2-iodoglycosyl ortho-iodobenzoates from protected glycals
作者:Puli Saidhareddy、Sama Ajay、Arun K. Shaw
DOI:10.1016/j.tet.2017.06.001
日期:2017.7
stereoselective synthesis of trans-2-deoxy-2-iodoglycosylacetates and O-iodobenzoates respectively from differently protectedglycals have been developed. They are compatible with a variety of protecting groups and various functional groups at 2C-position. Hexose-3,2-enolone 8 is obtained directly from 2-acetoxy glycal 5 by method A. An application to modified method B has been shown by synthesis of a diastereomerically
Mild Palladium‐Catalyzed Cyanation of Unprotected 2‐Iodoglycals in Aqueous Media as Versatile Tool to Access Diverse C2‐Glycoanalogues
作者:Maciej Malinowski、Thanh Van Tran、Morgane Robichon、Nadège Lubin‐Germain、Angélique Ferry
DOI:10.1002/adsc.201901583
日期:2020.3.4
Access to unprotected 2‐cyano‐glycals via a mild palladium‐catalyzed cyanation of protecting groups‐free 2‐iodoglycals in aqueous media has been developed. Diverse glycal substrates including disaccharide‐type were successfully obtained in good to excellent yields. These unprotected 2‐cyano‐glycal scaffolds were successfully derivatized to different C2‐glycoanalogues.
Efficient carbon-Ferrier rearrangement on glycals mediated by ceric ammonium nitrate: Application to the synthesis of 2-deoxy-2-amino-<i>C</i>-glycoside
作者:Alafia A Ansari、Y Suman Reddy、Yashwant D Vankar
DOI:10.3762/bjoc.10.27
日期:——
A carbon-Ferrier rearrangement on glycals has been performed by using ceric ammonium nitrate to obtain products in moderate to good yields with high selectivity. The versatility of this method has been demonstrated by applying it to differently protected glycals and by employing several nucleophiles. The obtained C-allyl glycoside has been utilized for the synthesis of a orthogonally protected 2-a