𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Warifteine and methylwarifteine: 1H and 13C assignments by two-dimensional NMR spectroscopy

✍ Scribed by Rabindranath Mukherjee; Paul A. Keifer


Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
114 KB
Volume
41
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The identity and structures of warifteine and methylwarifteine, two tertiary bisbenzylisoquinoline alkaloids of an unusual type, were elucidated and verified by 2D NMR spectroscopy. Complete ^1^H and ^13^C NMR spectral assignments were obtained. Copyright Β© 2003 John Wiley & Sons, Ltd.


πŸ“œ SIMILAR VOLUMES


Solasodine and diosgenin: 1H and 13C ass
✍ Raman Puri; Tuck C. Wong; Ravi K. Puri πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 393 KB πŸ‘ 1 views

## Abstract Solasodine and diosgenin have been widely used as starting materials for the partial synthesis of cortisone, progresterone and C21 steroidal derivatives (oral contraceptives). This study involved the total ^1^H and ^13^C spectral assignments of these two important compounds by using two

1H and 13C NMR spectral assignment of th
✍ Jean-Claude Ndom; J. Tanyi Mbafor; Z. Tanee Fomum; Marie-ThΓ©rΓ¨se Martin; Bernard πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 163 KB πŸ‘ 1 views

## Abstract Three prenylflavanones, sigmoidins A, B and C, were studied using one‐ and two‐dimensional NMR techniques. The interpretation of these spectra led to the definitive assignments of all carbon and hydrogen chemical shifts.

Complete assignment of the 1H and 13C NM
✍ Smail Allaoud; Hassan Bitar; Bernard Frange; Robert Faure πŸ“‚ Article πŸ“… 1989 πŸ› John Wiley and Sons 🌐 English βš– 214 KB

The total assignment of the 13C and the ' H NMR spectra of four derivatives of 1,3diaza-2,4-diboranaphthalene has been performed. The interpretation of the spectra was achieved from the concerted application of direct and long-range heteronuclear chemical shift correlation and homonuclear COSY two-d

13C NMR assignments of brassinosteroids
✍ Tetsu Ando; Masakazu Aburatani; Nozomu Koseki; Seiichi Asakawa; Takehito Mouri; πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 481 KB

## Abstract ^1^H NMR spectra of eight naturally occurring brassinosteroids, plant hormones with a steroid skeleton, and five synthetic analogues were analysed by COSY and long‐range COSY measurements. Based on the ^1^H resonances, the ^13^C signals were assigned by a combination of Cο£ΏH COSY and lon