✦ LIBER ✦

Piperaceae Alkaloids: Part I. Structure of piperstachine; 13C- and 1H-NMR. Studies

✍ Scribed by Balawant S. Joshi; Narayanan Viswanathan; Dilip H. Gawad; Wolfgang von Philipsborn

Publisher: John Wiley and Sons
Year: 1975
Tongue: German
Weight: 873 KB
Volume: 58
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19750580607

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

From the stem of Piper trichostachyon C. DC. a new alkaloid designated piperstachine (VII) has been isolated. Its structure is derived on the basis of spectral data and synthesis of hexahydropiperstachine (X).

📜 SIMILAR VOLUMES

1H and 13C NMR study of quaternary benzo

1H and 13C NMR study of quaternary benzo[c]phenanthridine alkaloids

✍ Radek Marek; Jaromír Toušek; Jiří Dostál; Jiří Slavík; Roger Dommisse; Vladimír 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 105 KB 👁 2 views

C and in some cases also 15 N chemical shifts of quaternary benzo[c]phenanthridine alkaloids (fagaronine, chelerythrine, chelilutine, chelirubine, nitidine, sanguilutine, sanguinarine, and sanguirubine) were systematically studied by NMR spectroscopy and ab initio calculations. The assignment of sig

1H and 13C NMR studies of (phenylethynyl

1H and 13C NMR studies of (phenylethynyl) (triphenylphosphine) gold(I)

✍ Maria Luisa Ganadu; Luciana Naldini; Guido Crisponi; Valeria Nurchi 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 473 KB

NMR spectral studies of dimedone-aldehyd

NMR spectral studies of dimedone-aldehyde adducts Part 1. 1H and 13C NMR spectral studies of dimedone

✍ Richard J. Cremlyn; Alan G. Osborne; Joanne F. Warmsley 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 651 KB

A detailed study of the 270 MHz IH and 67 MHz ~C NMR spectra of dimedone is reported. JcH coupling constants for the keto and enol forms are presented. In CDCI~ solution, the C-4 and C-6 carbons of the bulk polymeric enol tautomer are equivalent, with an averaged coupling to C-2, whilst they appear

1H and 13C nmr studies of salicylalanili

1H and 13C nmr studies of salicylalanilines

✍ M.Emilia L. Saraiva; Carlos F.G. Geraldes; Victor M.S. Gil 📂 Article 📅 1988 🏛 Elsevier Science 🌐 French ⚖ 430 KB

13C-NMR studies on the cevanine alkaloid

13C-NMR studies on the cevanine alkaloids : the application of 13C-NMR spectrum for structure elucidation of new alkaloids, baimonidine and isoverticine

✍ Kô Kaneko; Mikako Tanaka; Kimiaki Haruki; Nobuaki Naruse; Hiroshi Mitsuhashi 📂 Article 📅 1979 🏛 Elsevier Science 🌐 French ⚖ 325 KB

13C and 1H NMR studies of structure and

13C and 1H NMR studies of structure and tautomerism in some perimidines

✍ P. D. Woodgate; J. M. Herbert; W. A. Denny 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 604 KB

The 13C NMR spectra of some 1and 2-substituted perimidines and perimidinium salts are discussed and assigned. Although the spectra of most of the 2-substituted perimidines are comparatively simple, several examples display I3C and 'H spectral characteristics indicative of inhibition of prototropic t