✦ LIBER ✦

Conformational Analysis of Nine-Membered Cyclic Acetals. Stereoelectronic Effect in 2,4- and 3,5-Benzodioxonine Derivatives

✍ Scribed by Migda, Wojciech; Rys, Barbara

Book ID: 125986232
Publisher: American Chemical Society
Year: 2006
Tongue: English
Weight: 199 KB
Volume: 71
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo060422c

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Conformational Analysis of Benzoannulate

Conformational Analysis of Benzoannulated Nine-Membered Rings, 5. 1,2,6,7-Tetrahydro-4H-3,5-benzodioxonin

✍ Rys, Barbara ;Szneler, Edward ;Duddeck, Helmut 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 334 KB

## Abstract Temperature‐dependent ^1^H‐ and ^13^C‐NMR spectra of the title compound are presented. Coalescence effects are discussed and assigned to two dynamic processes: (a) ring inversion of the nine‐membered ring, (b) racemization of the enantiomeric ground‐state conformations of the nine‐membe

Conformational analysis of benzoanellate

Conformational analysis of benzoanellated nine-membered rings, Part 1. 1,4,5,7-tetrahydro-3H-2,6-benzodithionin derivatives

✍ Barbara Rys; Helmut Duddeck; Monika Hiegemann 📂 Article 📅 1991 🏛 Elsevier Science 🌐 French ⚖ 450 KB

The NW? spectra of compounds l-5, recorded at different temperatures, are discussed and interpreted in terms of conformational eguilibrium. Ground state conformations are found to be chiral, ring inversion barriers are surprisingly high (ca 48 kJ/mol).

Conformational analysis of benzoannulate

Conformational analysis of benzoannulated nine-membered rings. Part 3. 1,4,5,7-Tetrahydro-3H-2,6-benzodiselenine and its 4-spiro derivatives

✍ Barbara Rys; Helmut Duddeck; Monika Hiegemann 📂 Article 📅 1992 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 160 KB

Conformational analysis of benzoannulate

Conformational analysis of benzoannulated nine-membered rings: Part 2. X-ray analysis and force-field calculations of 1,4,5,7-tetrahydro-3H-2,6-benzodithionin and its derivatives

✍ Barbara Rys; Edward Szneler; Jacek Grochowski; Paweł Serda; Helmut Duddeck 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 502 KB

Conformational and configurational study

Conformational and configurational study of 2-phenyl-4-aryl-1,3,2-dioxaphosphonates derived from xylofuranose derivatives. The anomeric effect in the spontaneous isomerization of cyclic phosphonates

✍ Leticia Quintero; Herbert Höpfl; Martha Sosa-Rivadeneyra; Aurelio Ortiz; Rosa L. 📂 Article 📅 2012 🏛 Elsevier Science 🌐 French ⚖ 958 KB

Simultaneous analysis of indole-3-acetic

Simultaneous analysis of indole-3-acetic acid and detection of 4-chloroindole-3-acetic acid and 5-hydroxyindole-3-acetic acid in plant tissues by high-performance liquid chromatography of their 2-methylindolo-α-pyrone derivatives

✍ David Blakesley; John Frederick Hall; Geoffrey Donald Weston; Malcolm Charles El 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 697 KB

The use of high-performance liquid chromatography in the reversed-phase mode coupled to a spectrophotofluorimetric detector allowed the selective detection of acidic indoles possessing a C-3 methylene side chain, following the reaction of a purified plant extract with acetic anhydride. Of these acid