𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Organoselenium reagents in the tandem β-fragmentation-cyclization of carbohydrate anomeric alkoxy radicals

✍ Scribed by Rosa L Dorta; Cosme G Francisco; Ernesto Suárez

Publisher
Elsevier Science
Year
1994
Tongue
French
Weight
340 KB
Volume
35
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

Carbohydrates possessing a suitably positioned hydroql group in the presence of organoselenim ttagmts and iodine under an argon atmosphere un&rgo intramolecuku ~fagmetum~on-cydimtion mmion to give aldofnranose and aMopyrawse~nns of carbohydrates, spec@cdly.

📜 SIMILAR VOLUMES

Reagents with Hypervalent Iodine: Format
Reagents with Hypervalent Iodine: Formation of Convenient Chiral Synthetic Intermediates by Fragmentation of Carbohydrate Anomeric Alkoxy Radicals
✍ Dr. Pedro de Armas; Dr. Cosme G. Francisco; Prof. Ernesto Suárez 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 397 KB 👁 2 views

The intensities of the absorbances of i(C0) at 1975 and 2045cm-' and v(0,CCF;) at 1694and 1644 em-' increase in a c o n ~t a n t ratio. Compared with v(0,CCF;) of 1676cm-' in 2 and 1692cm-' in [Bu,N](O,CCF,). the hypsochromic shift ofone 0,CCF; group (1694 cm-') corresponds to an ionic 0,CCF; unit a

Fragmentation of alkoxy radicals: Mechan
Fragmentation of alkoxy radicals: Mechanistic aspects of the tandemβ-fragmentation-intramolecular functionalization reaction
✍ R Hernández; J.J Marrero; E Suárez; A Perales 📂 Article 📅 1988 🏛 Elsevier Science 🌐 French ⚖ 278 KB

## The formation of the B-peroxylactone (4) &ring the photolysis of lactol (3) .oo ## with (diace@yiodo)-benzene (DIB) and iodine under oxygen atmosphere a!emostrates the presence of a peroxyradical intermediate in the tandem p-fragmentation-intramolecularfunctionalization reaction. We have rec

ChemInform Abstract: Fragmentation of Ca
ChemInform Abstract: Fragmentation of Carbohydrate Anomeric Alkoxy Radicals. A New General Method for the Synthesis of Alduronic Acid Lactones.
✍ C. G. FRANCISCO; C. GONZALEZ MARTIN; E. SUAREZ 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 42 KB 👁 1 views

Fragmentation of Carbohydrate Anomeric Alkoxy Radicals. A New General Method for the Synthesis of Alduronic Acid Lactones. -In the presence of Ph-I(O-Ac) 2 /I 2 as well as diphenylhydroxyselenium acetate/I 2 /visible light carbohydrates of type (I), (III), and (V) smoothly undergo tandem β-fragmenta