✦ LIBER ✦

1H NMR spectra of diastereomeric 1,4-disubstituted 2,3-diphenylbutanes; examples of ABXX′ A′B′ and A2XX′A2′ spin systems

✍ Scribed by S. L. Spassov; N. D. Berova; G. E. Hawkes; E. W. Randall

Publisher: John Wiley and Sons
Year: 1983
Tongue: English
Weight: 165 KB
Volume: 21
Category: Article
ISSN: 0749-1581
DOI: 10.1002/omr.1270210114

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

A Convenient Synthesis of 2,3-Disubstitu

A Convenient Synthesis of 2,3-Disubstituted Derivatives of 4H-Pyrimido[2,1-b]benzothiazole-4-one.

✍ K. G. Baheti; S. B. Kapratwar; S. V. Kuberkar 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views

Low-temperature 1H and 13C NMR spectra o

Low-temperature 1H and 13C NMR spectra of N-substituted 1,2,3,4-tetrahydropyrazino[1,2-a]indoles

✍ Alan R. Katritzky; Novruz G. Akhmedov; Evgeniy M. Myshakin; Akhilesh K. Verma; C 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 414 KB

The temperature-dependent (1)H and (13)C NMR spectra of 2-(2-butynyl)-10-methyl-1,2,3,4-tetrahydropyrazino[1,2-a]indole (4) (as a representative example of 1-9) in CFCl(3) + CD(2)Cl(2) solution are described and discussed. Below 183 K, the hexahydropyrazine ring inversions become slow on the NMR tim

Novel Stereoconvergent Transformation of

Novel Stereoconvergent Transformation of 1,2a-Disubstituted 1,2,2a,8b-Tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-ones to 1,3-Disubstituted 1,2,4a,9b-Tetrahydrodibenzofuran-4-ols and Its Application to the Second-Generation Synthesis of (.+-.)-Linderol A.

✍ Masayuki Yamashita; Tomoki Inaba; Masaki Nagahama; Takashi Shimizu; Sachiko Kosa 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 39 KB 👁 1 views

Remarks on the analysis of dynamic 1H NM

Remarks on the analysis of dynamic 1H NMR spectra of A3B2 ⇌ C3D2 spin systems. Internal rotation in N,N-diethylbenzamide

✍ Adam Gryff-Keller; Przemyslaw Szczeciński 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 393 KB

Synthesis of a Novel Heterocyclic System

Synthesis of a Novel Heterocyclic System: 2H-Furo[3,2-b][1,4]benzothiazin-2-one.

✍ Anton V. Dolzhenko; Wai-Keung Chui 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 15 KB 👁 1 views

Thiazine derivatives R 0610 Synthesis of a Novel Heterocyclic System: 2H-Furo[3,2-b][1,4]benzothiazin--2-one. -The cyclocondensation of o-aminothiophenols (I) with citraconic anhydride (II) proceeds with good regioselectivity to give the benzothiazepinones (IV). They can be readily cyclized to the t

Derivatives of pyrido[2,3-b][1,4]diazepi

Derivatives of pyrido[2,3-b][1,4]diazepine and of the dipyrido[1,2-a:2′,3′-b]imidazole heterocyclic system

✍ Francesco Savelli; Alessandro Boido; Sonia Piacente 📂 Article 📅 2001 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 36 KB

## Abstract With a continuing interest in heteropolycyclic systems which may show biological activities, we studied the reaction of 3‐amino‐2‐(methylamino)pyridine with diethyl 1,3‐acetonedicarboxylate in order to develop pyridodiazepinone derivatives. From the reaction mixture, we separated dipyri