Anomeric Ξ±and Ξ²-N,O-psiconucleosides were prepared by 1,3-dipolar cycloaddition of C-ethoxycarbonyl N-methyl nitrone with ethyl 2-acetyloxyacrylate, followed by VorbrΓΌggen nucleosidation. The synthetic scheme has been applied to all purine and pyrimidine nucleobases. Nucleosidation can proceed under
Enantioselective synthesis of N,O-psiconucleosides
β Scribed by Ugo Chiacchio; Luisa Borrello; Daniela Iannazzo; Pedro Merino; Anna Piperno; Antonio Rescifina; Barbara Richichi; Giovanni Romeo
- Book ID
- 104359998
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 175 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0957-4166
No coin nor oath required. For personal study only.
β¦ Synopsis
The first enantioselective synthesis of b-D and b-L N,O-psiconucleosides is reported. The synthetic approach is based on the asymmetric 1,3-dipolar cycloaddition of the C-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-N-methyl nitrone with ethyl 2-acetyloxyacrylate followed by Vorbru Β¨ggen nucleosidation, and removal of the chiral auxiliary. Stereochemical assignments are supported by a DFT theoretical study of the cycloaddition reaction.
π SIMILAR VOLUMES
The diastereo-and enantioselective synthesis of aand b-3%-hydroxymethyl-N,O-nucleosides is described, based on the 1,3-dipolar cycloaddition of a N-glycosyl nitrone. Two approaches have been evaluated: the one-step procedure, which uses vinyl nucleobases, showed a better stereoselectivity towards b-
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a βFull Textβ option. The original article is trackable v