𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Solution conformation of the ketone and epoxide synthetic precursors of β-chamigrene determined by 1H and 13C NMR spectroscopy and distance geometry

✍ Scribed by Scott F. Leonard; Paul-James Jones; Denice M. Spero; T. Phil Pitner

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
349 KB
Volume
31
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Utilizing 2D NMR spectroscopy (COSY, NOESY, TOCSY, inverse detected ^1^H/^13^C correlation spectroscopy), the ^1^H and ^13^C NMR spectra of the ketone and epoxide precursors of β‐chamigrene were assigned. The dihedral angles and distances determined from NMR measurements provide input parameters to calculate the molecules' solution conformation by distance geometry. The factors which are important in influencing the conformation of these molecules are discussed.

📜 SIMILAR VOLUMES

Assignment of the 1H and 13C NMR spectra
Assignment of the 1H and 13C NMR spectra, sequence and conformation of the synthetic pentasaccharide SanOrg34006 and its precursors
✍ Judica Bootsma; Gerard Wagenaars; Erik Dreef; Floris Hout; Edwin Kellenbach 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 109 KB

## Abstract Proton and carbon chemical shift data and proton–proton coupling constants of the synthetic antithrombotic pentasaccharide SanOrg34006 and its synthetic precursors are reported. Long‐range heteronuclear correlation experiments allow the determination of the substitution pattern of the p

Determination of the geometry of acetoxy
Determination of the geometry of acetoxyendiynes and acetoxyenynes by NMR heteronuclear 13C1H scalar couplings and 13C NMR chemical shifts. Structural assignment of the oxylipin natural products peyssonenynes A and B
✍ Patricia García; Manuel Martín-Pastor; Ángel R. de Lera; Rosana Álvarez 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB

## Abstract Solution NMR methods were used for the structural characterization of the acetoxyendiyne __E__/__Z__ configuration of the marine natural products peyssonenynes A and B and their synthetic analogs derived from palmitic acid. The scarcity of protons in the proximity of the olefin preclude

Benzazoles XIII—determination of the E a
Benzazoles XIII—determination of the E and Z configuration of isomeric 2-(2-benzimidazolyl)-di- and -tetra-hydrothiophenes by IR, 1H and 13C NMR spectroscopy
✍ P. Sohár; Gy. Mányai; K. Hideg; H. O. Hankovszky; L. Lex 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 335 KB

## Abstract The configuration of the diastereomeric pairs of 2‐(3‐hydroxy‐3‐methyl‐5‐phenyl‐2,3‐dihydrothiophen‐2‐yl)benzimidazole (1a,1b) and 2‐(3‐hydroxy‐3‐methyltetrahydrothiophen‐2‐yl)benzimidazole (2a, 2b), as well as that of the acyl and diacyl derivatives of 2a and 2b, and the structure of t

Cyclodimerization of α,β–α′,β′-unsaturat
Cyclodimerization of α,β–α′,β′-unsaturated ketones promoted by samarium diiodide. Complete assignment of the 1H and 13C NMR spectra of hydroxycyclopentylpropenone derivatives
✍ Ronan Le Lagadec; María Isabel Chávez; Laura Rubio; Armando Cabrera 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 130 KB

## Abstract The ^1^H and ^13^C NMR chemical shift assignments of hydroxycyclopentylpropenone derivatives, prepared by a highly selective reaction between samarium(II) iodide and unsaturated ketones, are described. Two‐dimensional shift‐correlated experiments (COSY, HMBC, HMQC, NOESY) were used to a