𝔖 Bobbio Scriptorium
✦   LIBER   ✦

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

✍ Scribed by Radek Marek; Jaromír Toušek; Jiří Dostál; Jiří Slavík; Roger Dommisse; Vladimír Sklenář

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
105 KB
Volume
37
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

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 signals in the 1 H and 13 C NMR spectra was obtained from 2D NOE and gradient-enhanced single-quantum multiple bond correlation (GSQMBC) experiments. The ab initio geometry optimization using Gaussian 94 at the RHF/6-31 G ŁŁ level, followed by the calculation of chemical shielding using the deMon/NMR code at the IGLO II level, were carried out in order to rationalize the assignment of individual experimentally determined resonances.

📜 SIMILAR VOLUMES

1H and 13C NMR study of copteroside E de
1H and 13C NMR study of copteroside E derivatives
✍ Carlos M. Cerda-García-Rojas; Graciela Zamorano; María Isabel Chávez; César A. N 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 181 KB 👁 1 views
1H and 13C NMR Studies of Some Anthraqui
1H and 13C NMR Studies of Some Anthraquinones and Anthracenetetrones
✍ K. Danielsen; G. W. Francis; D. W. Aksnes 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 297 KB 👁 2 views

H and lSC NMR chemical shifts are reported and assigned for 1,4,9,10-and 2,3,9,1 O-anthracenetetrone. In addition, NMR data are given for 2,3-dihydroxy-9, 1 O-anthraquinone, 2.3-dimethoxy-9.10anthraquinone and 1 -hydroxy-2-acetoxy-9,l O-anthraquinone, encountered during the preparation of the anthra

1H and 13C NMR of bioactive isochromanyl
1H and 13C NMR of bioactive isochromanylacetylarylhydrazone derivatives
✍ M. R. L. Santos; M. G. de Carvalho; R. Braz-Filho; E. J. Barreiro 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 218 KB 👁 2 views

Careful analysis of the 1H and 13C NMR spectra of a series of isochromanylacetylarylhydrazone derivatives indicated the diastereomeric selective character in the synthetic step used to obtain the derivatives employing acidic conditions during the condensation of the corresponding acylhydrazides with

1H and 13C NMR spectral assignment of ph
1H and 13C NMR spectral assignment of phytochelatin
✍ Etsuro Yoshimura; Rinya Kobayashi; Kazuo Furihata; Hideyuki Kajiwara; Sunao Yama 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 40 KB 👁 2 views

1 H and 13 C NMR spectral data for phytochelatin, NH 3 C --Glu-Cys 2 -Gly-COO , were assigned by a combination of one-( 1 H, 13 C) and two-dimensional (DQF-COSY, CH-COSY, HMBC) NMR experiments.

1H and 13C NMR Spectral Assignment of St
1H and 13C NMR Spectral Assignment of Strychnobrasiline
✍ Marie-Thérèse Martin; François Frappier; Philippe Rasoanaivo; Milijaona Randrian 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 261 KB 👁 2 views

The indole alkaloid strychnobrasiline was studied using one-and two-dimensional NMR techniques. The interpretation of these spectra led to the complete assignments of all carbon and proton chemical shifts.

1H and 13C NMR study of some polychlorob
1H and 13C NMR study of some polychlorobuta-1,3-diene derivatives
✍ D. Botta; E. Mantica; L. Castellani; G. Dotelli; L. Zetta 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 110 KB 👁 1 views

Because of the upsurge of interest in polychlorobuta-1,3-diene derivatives as uncommon contaminants in underground water, seven congeners, the three pentachloro-and four tetrachloro-[(Z)-and (E)-1,1,3,4tetrachloro-, 1,1,4,4-tetrachloro-and (Z,Z)-1,2,3,4-tetrachloro]buta-1,3-dienes, were synthesized