Showing papers on "Intramolecular reaction published in 1987"
TL;DR: In this article, a modele permet de prevoir de facon precise la regioselectivite et la stereoselective des reactions de cyclisation des radicaux alkyles.
Abstract: Ce modele permet de prevoir de facon precise la regioselectivite et la stereoselectivite des reactions de cyclisation des radicaux alkyles
452 citations
290 citations
TL;DR: Exemples d'arylations intramoleculculeries d'arenes halogenes o-substitues par un groupe insature are given in this article.
Abstract: Exemples d'arylations intramoleculaires d'arenes halogenes o-substitues par un groupe insature
267 citations
TL;DR: In the presence of n -Bu4NCl, DMF and an appropriate base (Na2CO3, NaOAc or Et3N) cyclize nitrogen-containing o -iodoaryl alkenes to indoles, indolines,3 oxindoles, quinolines and isoquinolines.
163 citations
TL;DR: La cyclisation intramoleculaire de composes diyniques a ete effectuee en utilisant l'une des combinaisons de reactifs.
Abstract: La cyclisation intramoleculaire de composes diyniques a ete effectuee en utilisant l'une des combinaisons de reactifs: Cp 2 TiCl 2 /PMePh 2 /Na(Hg) ou Cp 2 ZrCl 2 /Mg/HgCl 2
138 citations
TL;DR: Some venom components of various ant species are synthesized by the application of the intramolecular addition of amine to carbon-carbon triple bonds in 5-alkynylamines.
Abstract: Intramolecular addition of amine to carbon-carbon triple bonds in 5-alkynylamines produces 2,3,4,5-tetrahydropyridines under the catalytic action of an aurate salt. Some venom components of various ant species are synthesized by the application of this reaction
120 citations
89 citations
86 citations
TL;DR: In this article, the inverse electron demand Diels-Alder reactions of 1,2,4-triazines have been effectively utilized for the synthesis of furo[2,3- b ] pyridines, 2,3dihydropyrano[2.3-b ]pyridine, and 2, 3dhydrocyclopyrrolo-[2, 3-b]-pyridine.
83 citations
81 citations
TL;DR: Tandem ene/intramolecular Diels-Alder reactions of 1,4-cyclohexadiene and mono-activated acetylenes are optimized in this paper.
TL;DR: By catalysis of AIBN, tosyl cyanide adds in a regio-and stereoselective manner to unsaturated hydrocarbons, including alkenes, dienes and 1-hexyne.
TL;DR: In this article, the synthese de macrocycles of macrocycles with 11 chainons is described. And the synthetes of macrocycled macrocycles are described in terms of addition intramoleculaire radicalaire d'acrylates d'α-iodoalkyle ou de fumarates d"ethyle et ω-Iodoalkyle.
Abstract: Etude de la synthese de macrocycles ayant au moins 11 chainons par addition intramoleculaire radicalaire d'acrylates d'ω-iodoalkyle ou de fumarates d'ethyle et ω-iodoalkyle. Cinetique
TL;DR: In this paper, the successful application of the nickel catalyzed, intramolecular [4+4] cycloaddition of bis-dienes to the preparation of both the AB and BC ring systems of the taxane diterpenes is described.
TL;DR: Synthese de methylene-8 octahydro-3,4,5,6,7,8,11,12 oxacyclododecinnone-2 par cyclisation de trifluoromesyloxy-7 octene-7oate de tributylstannyl-4 butene-3yle; application a l'obtention de cycles a 13, 14 et 15 chainons a partir des derives d'acides nonene- 8-, decene-9- and undecene-10oiques
Abstract: Synthese de methylene-8 octahydro-3,4,5,6,7,8,11,12 oxacyclododecinnone-2 par cyclisation de trifluoromesyloxy-7 octene-7oate de tributylstannyl-4 butene-3yle; application a l'obtention de cycles a 13, 14 et 15 chainons a partir des derives d'acides nonene-8-, decene-9- et undecene-10oiques
TL;DR: In this paper, aldehydes and ketones undergo intermolecular cycloaddition to electronegative olefins via azomethine imines, formed by a formal 1,2-prototropic shift, in low to moderate yield in xylene or ethanol.
TL;DR: In this paper, an ion exchange mechanism for light generation was proposed, modeled after the analogous process in the bioluminescence of the Firefly, and tested under conditions where the coumarin acid is recycled.
Abstract: : The reaction of an aminocoumarin carboxylic acid chloride (Coumarin 343) with 1-phenethyl hydroperoxide results in light emission that is easily detected with the unaided eye. This reaction proceeds through a secondary perester intermediate. Intramolecular electron exchange, modeled after the analogous process in the bioluminescence of the Firefly, is proposed as the mechanism for light generation. Attempts to carry out this reaction under conditions where the coumarin acid is recycled were not successful.
TL;DR: In this paper, the steric nature of the substituents at the stereogenic center of a tethered 1,3-dienes has been investigated and a model for the prediction of the extent and sense of diastereo induction was presented.
TL;DR: Etude de la transposition des radicaux cationiques CH 3 (CH 2 ) n NH 2 ¬+ en leurs isomeres distoniques ¬ CH 2(CH 2 ), n NH 3 + pour n = 0, 1, 2, 3 as mentioned in this paper.
Abstract: Etude de la transposition des radicaux cationiques CH 3 (CH 2 ) n NH 2 ¬+ en leurs isomeres distoniques ¬ CH 2 (CH 2 ) n NH 3 + pour n =0, 1, 2, 3
TL;DR: A palladium-promoted intramolecular arylation of a β-diketone generates a spirocyclic system as a model for Fredericamycin A as mentioned in this paper.
TL;DR: In this paper, it was shown that oxidation of a monocyclic radical to a cation precedes cyclization to form 3, 4, 7, and 8, respectively.
TL;DR: Par reaction du sec-butyl-lithium avec des esters bromo-2 phenyliques, il y a migration du groupe acyl, produisant apres hydrolyse des α-cetols correspondants.
Abstract: Par reaction du sec-butyl-lithium avec des esters bromo-2 phenyliques, il y a migration du groupe acyl, produisant apres hydrolyse des α-cetols correspondants
TL;DR: In this article, the intramolecular radical cyclization of ω-bromo α,β-unsaturated esters for the synthesis of carbocyclic compounds is described.
Abstract: The intramolecular radical cyclization of ω-bromo α,β-unsaturated esters for the synthesis of carbocyclic compounds is described. The effect of carbon chain substituents, the bulk of the ester grou...
TL;DR: A number of unsaturated 3-acylindoles were prepared and annulated (with HCl or NaClAlCl3) to 3,4-dihydrocyclopent[b]indol or 1,2,3,9-tetrahydro-4H-carbazol-4-ones depending on the structure of the substrate and/or the reaction conditions as mentioned in this paper.