Journal ArticleDOI
The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 19†‡. Thieno[3′,2′:4,5]thieno[2,3-c]-naphtho[1,2-f]quinoline, thieno[3′,2′:4,5]thieno[2,3-c]naphtho-[1,2-f][1,2,4]triazolo[4,3-a]quinoline and thieno[3′,2′:4,5]-thieno[2,3-c]naphtho[1,2-f]tetrazolo[1,5-a]quinoline
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TLDR
In this paper, the structural confirmation of 3-chloro-N-(3-phenanthryl)thieno[2,3-b]thiophene-2-carboxamide was achieved by the total assignment of its 1H and 13C nmr spectra by the concerted utilization of two-dimensional nm r spectroscopic methods.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 1997-09-01. It has received 17 citations till now. The article focuses on the topics: Quinoline & Tetrazole.read more
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Journal ArticleDOI
A Straightforward Route to Helically Chiral N-Heteroaromatic Compounds: Practical Synthesis of Racemic 1,14-Diaza[5]helicene and Optically Pure 1- and 2-Aza[6]helicenes†
Jiří Míšek,Filip Teplý,Irena G. Stará,Miloš Tichý,David Šaman,Ivana Císařová,Pavel Vojtíšek,Ivo Starý +7 more
TL;DR: The practical syntheses of 1,14-diaza[5]helicene (1), 1-aza[6]he Licene (2), and 2-aza [6] helicenes (3) are reported, which have succeeded in resolving racemates of 2 and 3 into their enantiomers, assigning their absolute configuration, determining the energy barriers to racemization, and obtaining Xray structures of their corresponding silver complexes.
Book ChapterDOI
The Chemistry of Thienopyridines
TL;DR: In this paper, the synthesis, reactivity, and biological activities of isomeric thienopyridines are discussed, and the synthesis and reactivity of the fused analogs are considered extremely important.
Journal ArticleDOI
Synthesis, Structures, and Optical Properties of Aza[4]helicenes
TL;DR: In this article, a series of aza[4]helicenes have been conveniently synthesized in yields of 71-92% by a one-pot procedure involving the Pictet-Spengler reaction.
Journal ArticleDOI
The synthesis of azoniadithia[6]helicenes
TL;DR: In this article, a new short-step synthesis of 8a-azonia[6]helicene and dithieno derivatives (2 and 3) is described.
References
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Journal ArticleDOI
Investigation of exchange processes by two‐dimensional NMR spectroscopy
TL;DR: In this paper, a general technique for the investigation of exchange processes in molecular systems is proposed and demonstrated and applications include the study of chemical exchange, of magnetization transfer by inter-and intramolecular relaxation in liquids, and of spin diffusion and cross-relaxation processes in solids.
Journal ArticleDOI
Proton and carbon-13 assignments from sensitivity-enhanced detection of heteronuclear multiple-bond connectivity by 2D multiple quantum NMR
Ad Bax,Michael F. Summers +1 more
Journal ArticleDOI
Sensitivity-enhanced two-dimensional heteronuclear shift correlation NMR spectroscopy
Ad Bax,Sankaran Subramanian +1 more
TL;DR: In this paper, a simple method that alleviates the dynamic range problem and that facilitates the suppression of signals from protons that are not coupled to the lowy nucleus is described, where the low-y nucleus was assumed to be 13C.
Journal ArticleDOI
Investigation of complex networks of spin-spin coupling by two-dimensional NMR
Ad Bax,Ray Freeman +1 more
TL;DR: In this paper, the two-dimensional Fourier transform was applied to a sample of 9-hydroxytricyclodecan-2,5-dione.
Journal ArticleDOI
Sensitivity-enhanced two-dimensional heteronuclear relayed coherence transfer NMR spectroscopy
Laura Lerner,Ad Bax +1 more
TL;DR: In this paper, the authors demonstrate that the use of 'H-detected heteronuclear RELAY spectroscopy is readily possible, providing an improvement in sensitivity of at least an order of magnitude over experiments that u t k e I3C detection.