✦ LIBER ✦

Conformation of (RS)- and (SS)-O,O-(2,2′-Binaphthyl)-N-(α-benzylethyl) Phosphamidate

✍ Scribed by Jun Liu; Min Wang; Mingan Wang; Wanyi Chen; Qifeng Shen; Libin Ma

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 432 KB
Volume: 35
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199702)35:2<79::aid-omr33>3.0.co;2-5

No coin nor oath required. For personal study only.

✦ Synopsis

The conformations of (RS)-and (SS)-O,O-(2,2º-binaphthyl)-N-(a-benzylethyl) phosphamidate (binaphthol phosphamidate) were examined by means of NMR, single-crystal x-ray di †raction and molecular mechanics calculations. There are physical and chemical di †erences between the two diastereoisomers such as di †erent abilities to form clathrates with ethanol. These di †erences provide the theoretical basis for the resolution of racemic binaphthol with optically active a-phenylethylamine.

📜 SIMILAR VOLUMES

Synthesis and conformational analysis of

Synthesis and conformational analysis of methyl 2-O-(α-D-Mannopyranosyl)-α-D-mannopyranoside

✍ Peters, Thomas 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 810 KB

## Abstract NMR experiments such as steady state NOE experiments and spin lattice ^1^H relaxation time measurements were performed on the synthetic disaccharide 10 that constitutes part of the polysaccharide backbone in fungal mannans. The spectro‐scopic data were compared with a theoretical model

Synthesis, crystal structure, and confor

Synthesis, crystal structure, and conformation of 3-O-(6-O-acetyl-2,3-anhydro-4-deoxy-α-l-ribo-hexopyranosyl)-1,2:5,6-di-O-isopropylidene-α-d-glucofuranose

✍ Janusz W. Krajewski; Przemysław Gluziński; Zofia Urbańczyk-Lipkowska; Anna Banas 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 638 KB

3-0-(6-0-Acetyl-2,3-anhydro-4-deoxy-a-L-ribo-hexopyranosyl)-l,2:5,6-di-O-isopropylidene-a-D-glucofuranose has been synthesised and its monocrystal investigated by X-ray diffraction methods. The compound crystallises in the orthorhombic system, space group P2,2,2t, with cell constants a = 8.790( 7),

Crystal structure and conformation of 3-

Crystal structure and conformation of 3-O-(2,3-anhydro-4-deoxy-α-l-lyxo-hexopyranosyl)-1,2:5,6-di-O-isopropylidene-α-d-glucofuranose

✍ Janusz W. Krajewski; Przemysl̵aw Gluziński; Anna Banaszek; Gyula Argay; Alajos K 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 381 KB

Synthesis of 2-Phenylquinoxaline from α-

Synthesis of 2-Phenylquinoxaline from α-Substituted N-(2-Dichloro-2-phenylethyl)arenesulfonamides and o-Phenylenediamine.

✍ G. N. Rozentsveig; I. B. Rozentsveig; A. N. Mirskova; G. G. Levkovskaya 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 13 KB 👁 1 views

Synthesis, crystal structure, and confor

Synthesis, crystal structure, and conformation of methyl 6-deoxy-2,3-O-isopropylidene-α-d-manno-heptofuranoside

✍ Janusz W. Krajewski; Przemysa̵w Gluziński; Zbigniew Pakulski; Aleksander Zamojsk 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 531 KB

Methyl 6-deoxy-2,3-0-isopropylidene-a-D-manno-heptofuranoside (9) has been synthesised from the acetyliron complex 2 by a sequence of reactions involving deprotonation of 2, its reaction with aldehyde 5, decomplexation, isolation of 7, and reduction to 9. Compound 9 crystallises in the orthorbombic

Synthesis of 2-acetamido-2-deoxy-4-O-β-d

Synthesis of 2-acetamido-2-deoxy-4-O-β-d-galactopyranosyl-3-O-methyl-d-glucopyranose (N-acetyl-3-O-methyllactosamine) and its benzyl α-glycoside

✍ Khushi L. Matta; Rashmi Vig; Saeed A. Abbas 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 553 KB

Benzyl 2-acetamido-2-deoxy-3-O-methyl-alpha-D-glucopyranoside (3) was obtained by deacetalation of its 4,6-O-benzylidene derivative (2). Compound 2 was prepared by methylation of benzyl 2-acetamido-4,6-O-benzylidene-2-deoxy-alpha-D-glucopyranoside with methyl iodide-silver oxide in N,N-dimethylforma