✦ LIBER ✦

Hydrogenolysis of 3,5-0-benzylidene acetals with the LiAlH4-AlCl3 reagent in methyl d-xylofuranosides

✍ Scribed by András Lipták; András Neszmélyi; Pavol Kováč; Ján Hirsch

Book ID: 104204495
Publisher: Elsevier Science
Year: 1981
Tongue: French
Weight: 447 KB
Volume: 37
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)88893-1

No coin nor oath required. For personal study only.

✦ Synopsis

Abebmt-The hydrogcnolysis of methyl 3,54benzylidene-a-and -/3-D-xylofuranoside derivatives with the LiAII&-AICI, reagent gave S-benzyl ethers as main products. In some cases the attack of the reagent occured at the ring oxygen of the furanoside skeleton to yield SObcnzyI-I-Omethylxylitol derivatives. The structure of the synthesized compounds was proved by %NMR spectroscopy. Unambiguous assignment of lies in the %NMR spectra of numerous partiauy methylrted methyl a-and &DxyIofuranoside derivatives has been made,

📜 SIMILAR VOLUMES

Hydrogenolysis of benzylidene acetals of

Hydrogenolysis of benzylidene acetals of 1,6-anhydro-β-d-galactopyranose derivatives with the LiAlH4—AlCl3 reagent

✍ Carmen Subero; Luis Fillol; Manuel Martín-Lomas 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 402 KB

Hydrogenolysis of the dioxolan type exo-

Hydrogenolysis of the dioxolan type exo- and endo- benzylidene derivatives of carbohydrates with the LiAlH4-AlCl3 reagent

✍ András Lipták 📂 Article 📅 1976 🏛 Elsevier Science 🌐 French ⚖ 207 KB

The active AlH2Cl reagent formed from equimolar quantitiee of AlC13 and LiAlH4, exhibits the properties of both Lewis acids and hydride donor&. Thia is the basis if its reactions with acetals to yield hydroxy-

Hydrogenolysis of the isomeric 1,2:4,6-d

Hydrogenolysis of the isomeric 1,2:4,6-di-O-benzylidene-α-d-glucopyranose derivatives with the LiAlH4AlCl3 reagent

✍ András Lipták; János Imre; János Harangi; Pál Nánási 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 497 KB

Chemo-, stereo- and regioselective hydro

Chemo-, stereo- and regioselective hydrogenolysis of carbohydrate benzylidene acetals. Synthesis of benzyl ethers of benzyl α-d-, methyl β-D-mannopyranosides and benzyl α-D-rhamnopyranoside by ring cleavage of benzylidene derivatives with the LiAlH4-AlCl3 reagent

✍ András Lipták; János Imre; János Harangi; Pál Nánási; András Neszmélyi 📂 Article 📅 1982 🏛 Elsevier Science 🌐 French ⚖ 704 KB

Reaction of MgCl2 with AlCl3 in ethyl ac

Reaction of MgCl2 with AlCl3 in ethyl acetate. The crystal structure of [Mg(CH3OCOC2H5)6][AlCl4]2

✍ Józef Utko; Piotr Sobota; Tadeusz Lis; Katarzyna Majewska 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 375 KB

The 2,3-epoxide, a donor in lanthanide s

The 2,3-epoxide, a donor in lanthanide shift-reagent studies of carbohydrate systems; the x-ray structure of methyl 2,3-anhydro-4,6-O-benzylidene-β-d-mannopyranoside

✍ Desmond Cunningham; Noel Gavin; Elizabeth Lee; Patrick McArdle; John O'Callaghan 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 584 KB

Lanthanide-induced shifts in the 'H-n.m.r. spectra of the methyl 2,3-anhydro-4,6-0-benzylidene-D-hexopyranosides [manno (1 and 5), allo (2 and 6), gulo (3 and 7), Q! and 0, respectively, and wtalo (4)] have been measured. The observed shift data for the cx-manno, @-allo, and fl-gulo epoxides were i