We describe an efficient synthesis of methyl 6-halogeno-6-deoxyglycosides which was performed using Ph$-X2 in DMF solution. Carbohydrate halides could thus be isolated in high yields without preliminary protection of the secondary hydroxyl groups, and were used as intermediates for the E&d
Stereochimie de l'alkylation de carbanions derives d'α-aminonitriles et de cyanhydrines bloquees.
✍ Scribed by E. Hebert; N. Maigrot; Z. Welvart
- Book ID
- 104220075
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 187 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Alkylations with 2-octyl iodide of carbanions generated in THF by LDA from d- aminonitriles or protected cyanohydrines occur with inversion of configuration and an important racemization ; these reactions do not involve radical intermediates.
En d&pit de l'importance synthetique des alkylations de carbanions derives d'cc-
📜 SIMILAR VOLUMES
## B_cthylenic alcohols can be prepared in ether fron an a-ethylenic bromide, a carbonyl compound and zinc, provided the metal is previously activated by addition of a small amount of trimethylchlorosil ane.
Gmupe de Rechcrches de Chimie structurale, Unite associic au C.N.R.S. 700, Universite de Rcnnes, 35092 RENNES. (I?ee&xd in Beighm 17 May 198%) RhAd -Les hydratides a-h&ogenis r&&sent en milieu basique avec ks reactifs nuc&ophilcr pour donner des hydruidcs a-fonctionnaiis&s. Nous montrons qw cctte re