𝔖 Bobbio Scriptorium
✦   LIBER   ✦

1H and13C NMR Studies of Heterocyclically Modified Tröger's Bases

✍ Scribed by J. Cudero; P. Jiménez; C. Marcos; C. Pardo; M. Ramos; J. Elguero; A. Fruchier


Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
284 KB
Volume
34
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


The ' H and '% NMR spectra of 15 modified representatives of Troger's base were recorded and the corresponding signals assigned. In 'H NMR, the appearance of the AABB'CC'(XX) system, after irradiation of H,(H,), is deceptively simple and should not be first-order analysed. The 13C chemical shifts and 'J('H-'%) coupling constants are characteristic of these molecules.


📜 SIMILAR VOLUMES


Complete 1H and 13C NMR Analysis of an A
✍ Carmen Pardo; Mar Ramos; Alain Fruchier; José Elguero 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 243 KB

The 'H and I3C NMR spectra of an asymmetric Troger's base were recorded and the corresponding signals assigned on the basis of long-range coupling constants and 'H-13C correlations. In 1H NMR, ambiguities in the assignment of e m and endo hydrogen atoms and in the long-range couplings between the me

1H NMR study of heterocyclic symmetric a
✍ M. Demeunynck; C. Fontaine; J. Lhomme 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 170 KB

The 1H NMR spectra of a series of acridine-derived Tro gerÏs base analogs substituted at various positions were registered. Also the 1H NMR characteristics of the Ðrst heterocyclic asymmetric Tro gerÏs base analog constituted of one acridine and one phenanthroline nucleus with the two corresponding

1H and 13C NMR Studies of Some Anthraqui
✍ 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

13C- and 1H-nmr studies of cis-trans con
✍ Yen-Yau H. Chao; R. Bersohn 📂 Article 📅 1978 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 321 KB

In aqueous solutions, 13C-and 'H-nmr studies show that the percentage of trans conformation of proline oligomers +H\*N Pro-(Pro),-CO; increases substantially from n = 1 (65% trans) t o n = 2 (90% trans). The relatively low percentage of trans structure for the dimer ( n = 1) very likely is caused by

1H and13C NMR Studies of SomeN-(9H-xanth
✍ E. Filippatos 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB 👁 1 views

The 'H and 13C NMR spectra of various N-(SH-xanthen-9-yl)alkanamides are reported. The 'H NMR results suggest that in the case of the N-(SH-xanthen-9-y1)-3dialkylaminopropanamides intramolecular NH.. .N hydrogen bonding occurs in CDCI,.

Room-temperature (1H, 13C) and variable-
✍ K. C. Lewis; A. R. Maxwell; S. McLean; W. F. Reynolds; R. G. Enriquez 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 67 KB

Spinosin, a C-glycoside flavonoid, was isolated from the plant Desmodium tortuosum (Sw.) DC. The 1 H and 13 C NMR data acquired at room temperature exhibited doubling of signals, suggesting the presence of two rotamers in solution. Variable-temperature 1 H NMR experiments confirmed this hypothesis.