✦ LIBER ✦

tert-Butyl 7-cycloheptatrienylperacetate: The proton NMR spectrum and conformational analysis

✍ Scribed by G. R. Jurch Jr; M. D. Johnston Jr

Publisher: John Wiley and Sons
Year: 1975
Tongue: English
Weight: 361 KB
Volume: 7
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270070210

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The proton magnetic resonance spectrum of tert‐butyl 7‐cycloheptatrienylperacetate has been analyzed with the aid of the lanthanide shift reagents, Eu(fod)~3~ Yb(fod)~3~. Observation of the lanthanide‐induced shifts showed, in conjunction with variable temperature studies establishing the conformational purity of the cycloheptatrienyl ring, that the peracetate substituent has a definite equatorial preference.

📜 SIMILAR VOLUMES

Assignment of proton NMR resonances and

Assignment of proton NMR resonances and conformational analysis of the K13CK cystatin-like peptide

✍ Catherine Samsoen; Evelyne Lebrun; Roland Van Rapenbusch; Daniel Davoust; Gilles 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 282 KB

## Abstract The assignments of the proton NMR signals and the conformational analysis of the cystatin‐mimicking peptide K13CK (Lys‐Val‐Gly‐Gly‐Gln‐Val‐Val‐Cys‐Gly‐Ala‐Pro‐Trp‐Lys) in aqueous solution at pH 3.2 have been achieved using two‐dimensional DQF‐COSY, HOHAHA and ROESY nuclear magnetic reso

Application of two-dimensional NMR spect

Application of two-dimensional NMR spectroscopy to the analysis of the proton NMR spectrum of sparteine and its lactams

✍ W. Marek Gołȩlebiewski 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 969 KB

Steric perturbation of the conjugated tr

Steric perturbation of the conjugated triene chromophore. Conformational analysis of (E)- and (Z)-3-methyl-1,3,5-hexatriene and (Z)-3-tert-butyl-1,3,5-hexatriene

✍ A. M. Brouwer; L. Bezemer; H. J. C. Jacobs 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 614 KB

## Abstract A theoretical and NMR‐spectroscopic conformational analysis is presented of the 3‐methyl‐1,3,5‐hexatrienes and of (__Z__)‐3‐__tert__‐butyl‐1,3,5‐hexatriene. It is shown that (__E__)‐3‐methyl‐1,3,5‐hexatriene exists mainly as the __tEt__ rotamer and (__Z__)‐3‐methyl‐1,3,5‐hexatriene as t

Proton NMR Conformational Analysis of Cy

Proton NMR Conformational Analysis of Cyclic β-Casomorphin Analogues of the Type Tyr-cyclo[-Nω-D-Orn-Xaa-Yaa-Gly-]

✍ Carmen Mrestani-Klaus; Wolfgang Brandt; Ralf Schmidt; Klaus Neubert; Peter W. Sc 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 880 KB

A conformational study of the cyclic P-casomorphin-5 analogues H-Tyr-cyclo[ -D-Om-2-Nal-Pro-Gly-J (1) (p-selective agonist; 2-Nal = 2-naphthylalanine), H-Tyr-cyclo[-D-Orn-2-Nal-D-Pro- Gly-] (2) (mixed f.~ agonistl6 antagonist) and H-Tyr-cyclo[ -D-Om-Phe-D-Pro-Gly-] (3) (highly potent p and 6 agonis

Selective INEPT, a new technique for the

Selective INEPT, a new technique for the 13C NMR assignment of methylene carbons with non-equivalent protons, and its application to the analysis of the 13C NMR spectrum of monensin

✍ Kazuo Furihata; Haruo Seto; Muneki Ohuchi; Noboru Otake 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 365 KB

Structural and conformational analysis b

Structural and conformational analysis by 1H NMR and 13C NMR of a new angiotensin I converting enzyme inhibitor, the tert-butylamine salt of (2S)-2-[(1S)-1-carbethoxybutylamino]-1-oxopropyl-(2S, 3aS, 7aS) perhydroindole-2-carboxylic acid (perindopril)

✍ N. Platzer; J. P. Bouchet; J. P. Volland 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 571 KB

Structural and Conformational Analysis by lH NMR and 13C NMR of a New Angiotensin I Converting Enzyme Inhibitor, the tert-Butylamine Salt of (2S)-2-[ (1S)-l-Carbethoxybutylamino]-loxopropyl-(2S,3aSJaS) perhydroindole-2-carboxylic acid (Perindopril)