Results 191 to 200 of about 4,871 (254)
Some of the next articles are maybe not open access.
, 2010
A combination of tandem addition—fragmentation of vinylogous acyl triflates (II), (XII) towards iodobenzene derivatives and intramolecular benzannulation of o-alkynylphenyl ketones (VI) and (XIII) is successfully applied as novel strategy for the ...
David M. Jones, G. Dudley
semanticscholar +1 more source
A combination of tandem addition—fragmentation of vinylogous acyl triflates (II), (XII) towards iodobenzene derivatives and intramolecular benzannulation of o-alkynylphenyl ketones (VI) and (XIII) is successfully applied as novel strategy for the ...
David M. Jones, G. Dudley
semanticscholar +1 more source
Synthesis and nuclear magnetic resonance spectroscopy of indane structures: indanes mono- and disubstituted in the pentagonal ring [PDF]
Canadian Journal of Chemistry, 1991 Indanes monosubstituted and 1,2- and 1,3-disubstituted in the pentagonal ring were synthesized, and configurations were assigned to the 1,2-disubstituted compounds by means of nuclear magnetic resonance spectroscopy. Key words: mono- and disubstituted indanes, conformation, configuration, 1H and 13C NMR, synthesis.
Adriana F. Ibanez +4 more
openaire +1 more source
, 2003
6-Methoxy-1-tetralone was transformed in six steps into an indan derivative related to the sesquiterpenes mutisianthol and jungianol. Key steps involve a thalium(III)-promoted ring-contraction (to assemble the indan unit)and a Wittig olefination (to ...
H. Ferraz, A. M. Aguilar, L. Silva
semanticscholar +1 more source
6-Methoxy-1-tetralone was transformed in six steps into an indan derivative related to the sesquiterpenes mutisianthol and jungianol. Key steps involve a thalium(III)-promoted ring-contraction (to assemble the indan unit)and a Wittig olefination (to ...
H. Ferraz, A. M. Aguilar, L. Silva
semanticscholar +1 more source
Synthesis of 2-Sulfonyl Indenes and Indanes
The Journal of Organic Chemistry, 2019In this paper, we developed facile and high-yield synthetic routes for the preparation of 2-sulfonyl indenes and indanes, including: (i) Amberlyst-15-promoted Knoevenagel reaction of β-ketosulfones and arylaldehydes in refluxing toluene; (ii) Grignard reagent (R'MgBr) or reducing reagent (NaBH4) promoted regio- and/or stereocontrolled 1,4-addition or 1,
Meng-Yang Chang +3 more
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Die Reduktion des Indans mit Natrium und Alkohol in flüssigem Ammoniak
, 1958Die Reduktion des Indans mit Natrium und Alkohol in flussigem Ammoniak wird beschrieben und die Konstitution des entstehenden 4,7-Dihydro-indans bewiesen.
E. Giovannini, H. Wegmüller
semanticscholar +1 more source
, 2007
Several aspects of the synthesis of indans through a thallium(III)-mediated ring contraction reaction of 1,2-dihydronaphthalene derivatives bearing suitably positioned primary and secondary hydroxyl groups are disclosed.
L. Silva +4 more
semanticscholar +1 more source
Several aspects of the synthesis of indans through a thallium(III)-mediated ring contraction reaction of 1,2-dihydronaphthalene derivatives bearing suitably positioned primary and secondary hydroxyl groups are disclosed.
L. Silva +4 more
semanticscholar +1 more source
Ring puckering splitting and structure of indan
Journal of Molecular Spectroscopy, 2015The ground state ring puckering splitting of the cyclopentane ring of indan has been precisely determined (Delta E-01 = 22.364(1) MHz) by measuring the very weak mu(c)-type transitions with pulse jet Fourier transform microwave spectroscopy. In addition, the rotational spectra of all C-13 monosubstituted isotopologues have been assigned and measured in
Favero, Laura B. +3 more
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ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. M. Aguirre +4 more
openaire +2 more sources
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. M. Aguirre +4 more
openaire +2 more sources
, 1997
α-Functionalized 1-benzylbenzotriazoles (3, 4 and 12), derived from the lithiation of 1-(2,3-dimethoxybenzyl)benzotriazole 2 followed by reactions with electrophiles, or from the condensation of benzyl alcohol 11 with benzotriazole, undergo formal [3 + 2]
A. Katritzky, Guifen Zhang, L. Xie
semanticscholar +1 more source
α-Functionalized 1-benzylbenzotriazoles (3, 4 and 12), derived from the lithiation of 1-(2,3-dimethoxybenzyl)benzotriazole 2 followed by reactions with electrophiles, or from the condensation of benzyl alcohol 11 with benzotriazole, undergo formal [3 + 2]
A. Katritzky, Guifen Zhang, L. Xie
semanticscholar +1 more source
The Indans Formed by Dimerization of Some Aromatic Terpenoids
, 1986Previous work upon the dimerization of carvacrol derivatives to form indans is corrected. During attempts to synthesize compound (I), the diterpenoid occurring in Callitris macleayana heartwood,' we had occasion to reflux the o-quinol acetate (2) with ...
R. Carman, N. Vandonge
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