Showing papers on "Intramolecular reaction published in 1985"
TL;DR: Generation des ions Nacyliminiums and syntheses de leurs precurseurs; amidoalkylations intramoleculaires avec des π-nucleophiles aromatiques; reactions de π nucleophilia non aromatique; utilisation des composes a methylene actif; reactions pericycliques
483 citations
140 citations
TL;DR: L'influence du rayonnement proche UV and l'effet d'inhibiteurs impliquent un mecanisme radicalaire en chaine as mentioned in this paper.
Abstract: L'influence du rayonnement proche UV et l'effet d'inhibiteurs impliquent un mecanisme radicalaire en chaine
135 citations
TL;DR: In this article, a cycloaddition of cetenes and sels de ceteneiminium derives d'acides aliphatiques insatures of bicycliques.
Abstract: On prepare une serie de cetones bicycliques par cycloaddition de cetenes et de sels de ceteneiminium derives d'acides aliphatiques insatures
98 citations
92 citations
TL;DR: Synthese basee sur la condensation de Friedlander de l'amino-2 benzyloxy-3 bromo-4 benzaldehyde et d'acetyl-1 methyl-4 β-carbolinecarboxylate-3 de methyle prepare a partir de Pd(0) de l"acetyl6 amino-5 bromomino-4 phenyl-4 methyl-5 pyridinedicarboxylates-2,6 de dimethyle via la cyclisation en presence de complexe de P
Abstract: Synthese basee sur la condensation de Friedlander de l'amino-2 benzyloxy-3 bromo-4 benzaldehyde et d'acetyl-1 methyl-4 β-carbolinecarboxylate-3 de methyle prepare a partir d'amino-3 bromo-2' phenyl-4 methyl-5 pyridinedicarboxylate-2,6 de dimethyle via la cyclisation en presence de complexe de Pd(0) de l'acetyl-6 amino-5 bromo-2' phenyl-4 methyl-3 picolinate de methyle
88 citations
85 citations
85 citations
TL;DR: In this article, a diastereoselective intramolecular nitrone-olefin cyclization was used to synthesize daunosamine and acosamine.
84 citations
TL;DR: Azomethine ylides are readily generated from imines of α-amino acid esters by a formal 1,2-H shift as discussed by the authors, and a suitably positioned unactivated double or triple bond in either of the two precursors of the imines leads to an intramolecular cycloaddition generating fused ring systems in good yield.
75 citations
TL;DR: In this paper, the ene reaction of singlet oxygen (1O2) was examined using time-resolved techniques and by an intramolecular trapping reaction, and it was shown that the rate of 1O2 with simple olefins is controlled by ΔS.
TL;DR: In this article, a procedure for the synthesis of furans from 3-alkyn-1,2-diols or 2-methoxy-3-alkyna-1-ols by palladium catalyzed intramolecular addition of alcoholic moiety to acetylene linkage followed by elimination of water or methanol is described.
TL;DR: In this paper, the trend in stereoselectivities of intramolecular Diels-Aider reactions upon substitution is rationalized by a "twist-asynchronous" model, which is supported by MM2 model calculations.
TL;DR: In this article, the reaction of carbene-chromium complexes with alkynes provides a direct route to naphthoquinone derivatives and is the key step in a new approach to the isochromanone antibiotics exemplified by deoxyfrenolicin and nanaomycin A (2).
TL;DR: In this article, the insertion of C-H-1,5 dalkylidenecarbenes est stereospecifique, based on l'effet isotopique du deuterium independant de la temperature.
Abstract: L'insertion C-H-1,5 d'alkylidenecarbenes est stereospecifique. En se basant sur l'effet isotopique du deuterium independant de la temperature on pense que cette reaction a lieu par l'intermediaire d'un etat de transition non lineaire
TL;DR: Several oxygen-substituted o-nitrobenzylic compounds in THF solution were studied by photo-conditional transient spectroscopy as mentioned in this paper, and the o-quinonoid intermediate resulting from intramolecular H abstraction was observed in those compounds which undergo efficient reaction.
Abstract: Several oxygen-substituted o-nitrobenzylic compounds in THF solution were studied by picosecond transient spectroscopy. The o-quinonoid intermediate resulting from intramolecular H abstraction was observed in those compounds which undergo efficient reaction. In the case of phenyl o-nitrobenzyl ether and p-cyanophenyl o-nitrobenzyl ether, both the triplet excited state and the o-quinonoid were observed at early times. For these two compounds, the o-quinonoid intermediate is formed from the singlet excited state at a rate much faster than triplet decay. 18 references, 4 figures.
TL;DR: In this paper, the authors proposed a method to construct an octane-1-carboxylic acid (CSA) from a carboxyl acid (CARB) with a 4-acetoxybicycle.
Abstract: l-bromobicyclo[2.2.2]octane, 7697-09-8; 4-acetoxybicyclo[2.2.2]octane-1-carboxylic acid, 72963-86-1; 4-chlorobicyclo[2.2.2]octane-1-carbonyl fluoride, 94994-06-6; 4-(trifluromethyl) bicyclo[2.2.2Joctan-l-o1, 94994-07-7; l-(tert-butyl)-4-methoxybicyclo[2.2.2]octane, 81687-94-7; l-iodo-4-methylbicyclo[2.2.2Joctane, 55044-63-8; 1-methoxy-4-methylbicyclo[2.2.2]octane, 6555-95-9; 4-phenylbicyclo[2.2.2Joctane-l-amine, 10206-89-0; 4-phenylbicyclo[2.2.2]octane-l-carboxylic acid, 953-69-5; 4-phenylbicyclo[2.2.2Joctane-l-carboxamine, 23744-33-4; l-cyano-4phenylbicyclo[2.2.2Joctane, 950-22-1; 4-[1-(trimethylsily1)ethynyl]bicyclo[2.2.2Joctane-l-carboxaldehyde, 94994-08-8; 4iodobicyclo[2.2.2Joctane-l-carboxaldehyde, 94994-09-9; 1,l-dichloro-2-(4-iodobicyclo[2.2.2Joct-1-yl)ethene, 94994-10-2; l-(trimethylsilyl)-2-(4-iodobicyclo[2.2.2]oct-l-yl)ethyne, 94994-11-3; 4-fluorobicyclo[2.2.2]octane-l-carboxylic acid, 78385-84-9; bicyclo[2.2.2]octane-l-methanol, 2574-42-7; 4-nitrobicyclo[2.2.2Joctane-1-methanol, 94994-12-4; 4-cyanobicyclo[2.2.2]octane-lmethanol, 94994-13-5; 4-(trifluoromethyl)bicyclo[2.2.2]octane-lmethanol, 94994-14-6; methyl 4-(hydroxymethyl)bicyclo[ 2.2.21octane-1-carboxylate, 94994-15-7; 4-fluorobicyclo[2.2.2]octane-lmethanol, 94994-16-8; 4-chlorobicyclo[2.2.2]octane-l-methanol, 94994-17-9; 4-bromobicyclo[2.2.2]octane-l-methanol, 94994-18-0; 4-methoxybicyclo[2.2.2]octane-l-methanol, 94994-19-1; 4phenylbicyclo[2.2.2]octane-l-methanol, 23760-80-7; 4-methylbicyclo[2.2.2Joctane-l-methanol, 28305-83-1; 4-tert-butylbicyclo[2.2.2]octane-l-methanol, 94994-20-4; 4-iodobicyclo[ 2.2.2loctane1-methanol, 94994-21-5; bicyclo [ 2.2.21 octane1carboxaldehyde, 2064-05-3; 4-nitrobicyclo[2.2.2Joctane-lcarboxaldehyde, 94994-22-6; 4-cyanobicyclo[2.2.2]octane-lcarboxaldehyde, 94994-23-7; 4-(trifluromethyl) bicyclo[2.2.2]0~tane-1-carboxaldehyde, 94994-24-8; 4-carbomethoxybicyclo[2.2.2Joctane-l-carboxaldehyde, 94994-25-9; 4-fluorobicyclo[2.2.2]octane-l-carboxaldehyde, 78385-82-7; 4-chlorobicyclo[2.2.2]octane-l-carboxaldehyde, 94994-26-0; 4-bromobicyclo[ 2.2.2]octane-l-carboxaldehyde, 94994-27-1; 4-methoxybicyclo[2.2.2]octane-l-carboxaldehyde, 94994-28-2; 4-phenylbicyclo[2.2.2]octane-l-carboxaldehyde, 94994-29-3; 4-methylbicyclo[2.2.2]octane-l-carboxaldehyde, 94994-30-6; 4-tert-butylbicyclo[2.2.2]octane-l-carboxaldehyde, 94994-31-7; 4-ethynylbicyclc[2.2.2]octane-l-carboxaldehyde, 94994-32-8; 4-ethynylbicyclo[2.2.2]octane-l-methanol, 94994-33-9; 4-ethynylbicyclo[2.2.2]0~tane-1-carboxylic acid, 94994-34-0; bicyclo[2.2.2]octane-lcarboxylic acid, 699-55-8; 4-bromobicyclo[ 2.2.2]octane-l-carboxylic acid, 1989-50-0; 4-chlorobicyclo[2.2.2]octane-l-carboxylic acid, 1007-73-4; 4-methylbicyclo[2.2,2]octane-l-carboxylic a id, 702-67-0; 4-nitrobicyclo[ 2.2.2]octane-l-carboxylic acid, 775-65-5; 4-cyanobicyclo[2.2.2]octane-l-carboxylic acid, 15941-09-0; l-methoxybicyclo[2.2.2]octane, 7697-14-5; 4-methoxybicyclo[ 2.2.2 Joctane1-carboxylic acid, 773-34-2; methanol, 67-56-1; iodine monochloride, 7790-99-0; chlorine, 7782-50-5; iodine, 7553-56-2; iodotrimethylsilane, 16029-98-4; l-nitro-4-phenylbicyclo[2.2.2]octane, 64852-68-2; methyl 4-phenylbicyclo[2.2,2]octane-l-carboxylate, 23062-52-4; chlorotrimethylsilane, 75-77-4; N-formylpiperidine, 2591-86-8; carbon monoxide, 630-08-0.
TL;DR: In this paper, a modele moleculaire for the conversion of l'etat fondamental du dimethylamide de l'acide p-tolylamino-6 naphtalenesulfonique-2 and dudimethylamino4 benzonitrile en un etat de transfert de charge is presented.
Abstract: Formulation d'un modele moleculaire pour la conversion de l'etat fondamental du dimethylamide de l'acide p-tolylamino-6 naphtalenesulfonique-2 et du dimethylamino-4 benzonitrile en un etat de transfert de charge
TL;DR: In this paper, an efficient intramolecular cycloadditions of N-3-alkenyl- and N-4-alkENyl-nitrones proceed with opposite regioselection which is modified by dipolarophile-substituent effects.
TL;DR: In this paper, remote substituents that influence ground state state rotamer populations were found to be important controlling factors in the intramolecular Diels-Alder reaction with furan.
TL;DR: The urethanes and to-samides of 3-hydroxypent-4-enylamine and its C1 C4 substituted derivatives undergo the palladium catalyzed intramolecular aminocarbonylation (0.1 equiv of PdCl2, 3.0 equivaliv of NaOAc in acetic acid under ca. 1 atm of CO).
TL;DR: On prepare plusieurs systemes contenant deux olefines electrophiles, lune etant une cetone α-methylene, l'autre un ester α,β-insature as discussed by the authors.
Abstract: On prepare plusieurs systemes contenant deux olefines electrophiles, l'une etant une cetone α-methylene, l'autre un ester α,β-insature. L'addition de Michael de l'enolate de lithium du trimethylsiloxy-2methyl-3butene-1 sur ces systemes, suivie d'une addition intramoleculaire de Michael, conduit a la formation du systeme tricyclique a 3 noyaux en C 6 . On a pu ainsi obtenir le dimethyl-3aflavinine
TL;DR: In this article, a concise synthesis for the neurotoxic physostigmine alkaloid d,l-eserethole is described which reliess upon an intramolecular cycloaddition reaction involving a non-stabilized imidate methylide and an unactivated alkene.
TL;DR: In this article, three, five, six, and seven-membered carbocyclic compounds were synthesized highly stereo-selectively by the Michael induced intramolecular alkylation.
TL;DR: In this article, the intramolecular Diels-alder reactions of aldehydes 3a and 3b afford lactones 4 and 5, respectively, and the mechanism of the reactions is considered.