885462-68-0Relevant articles and documents
STEREOSELECTIVE SYNTHESIS OF PHOSPHOROTHIOATE OLIGORIBONUCLEOTIDES
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Page/Page column 22, (2017/12/15)
The present invention relates to chiral phosphoramidites represented by formula (Ia) or formula (Ib) as novel monomers for the synthesis of stereodefined phosphorothioate MOE oligonucleotides. Furthermore, the present invention relates to a method for synthesizing stereodefined phosphorothioate MOE oligonucleotides using said novel chiral phosphoramidites.
Highly stereoselective syntheses of proline-derived vicinal amino alcohols through grignard addition onto N-tosylprolinal
Chaudhuri, Saikat,Parida, Amarchand,Ghosh, Santanu,Bisai, Alakesh
, p. 215 - 220 (2016/01/20)
A highly diastereoselective Grignard addition to N-tosyl-l-prolinal has been developed to deliver a variety of proline-derived vicinal amino alcohols in good to excellent yields with high diastereoselectivities. A similar selectivity was also obtained by using N-tosyl-d-prolinal. The methodology has been applied to the synthesis of medicinally important 3-hydroxy-2-phenylpiperidines.
Quick access to optically pure 2-(1-hydroxybenzyl)piperidine and pyrrolidine
Ruano, Jose Luis Garcia,Aleman, Jose,Cid, M. Belen
, p. 687 - 691 (2007/10/03)
Optically pure 2-(1-hydroxybenzyl)piperidine and pyrrolidine were prepared by reaction of oxygenated 2-(p-tolylsulfinyl)benzyl carbanions with the appropriate chlorinated N-sulfinylimines followed by subsequent elimination of the sulfinyl groups. The main reaction is a tandem process involving nucleophilic addition of the sulfinylbenzyl carbanion to the C=N bond followed by intramolecular elimination of the chlorine by the resulting amide. The matched pair of the reagents (exhibiting the same configuration at their respective sulfinyl moieties) evolves with a complete control of the stereoselectivity at the two newly created chiral carbons. Georg Thieme Verlag Stuttgart.