704-00-7Relevant academic research and scientific papers
Synthesis of 3-hydroxyindanones via potassium salt of amino acid catalyzed regioselective intramolecular aldolization of ortho-diacylbenzenes
Chanda, Tanmoy,Chowdhury, Sushobhan,Anand, Namrata,Koley, Suvajit,Gupta, Ashutosh,Singh, Maya Shankar
supporting information, p. 981 - 985 (2015/03/04)
First organocatalytic intramolecular aldolization of ortho-diacylbenzenes to construct highly functionalized 3-hydroxyindanones is described. In this transformation a high trans-selectivity is achieved by the use of metal salt of amino acid. This method allows an easy access to the strained spirocyclic 3-hydroxyindanones related to a number of natural product frameworks. Synthesis of a new class of indole skeleton substituted by 3-hydroxyindanones added an extra essence to this new protocol.
Simple Aza -conjugate addition methodology for the synthesis of isoindole nitrones and 3,4-dihydroisoquinoline nitrones
Peacock, Lucy R.,Chapman, Robert S. L.,Sedgwick, Adam C.,Bull, Steven D.,Mahon, Mary F.,Amans, Dominique
supporting information, p. 994 - 997 (2015/03/18)
Aryl-aldehydes containing ortho-substituted α,β-unsaturated carboxylic acid derivatives react with hydroxylamine to afford reactive N-hydroxy-carbinolamine intermediates that undergo intramolecular aza-conjugate addition reactions to afford isoindole nitrones and 3,4-dihydroisoquinoline nitrones in good yield. Conditions have been developed to reduce these isoindole nitrones to their corresponding hydroxylamine, enamine, and amine derivatives. Isoindole nitrones react with dimethyl acetylenedicarboxylate (DMAD) via a [4 + 2]-cycloaddition/deamination pathway to afford substituted naphthalene derivatives, while 3,4-dihydroisoquinoline nitrones react with DMAD via a [1,3]-dipolar cycloaddition pathway to afford tricyclic heteroarenes.
Synthesis of 4,5-Benzotropones by Cyclization of 1,3-Bis-Silyl Enol Ethers with 1,2-Dialdehydes
Albrecht, Uwe,Van Nguyen, Thi Hong,Langer, Peter
, p. 3417 - 3424 (2007/10/03)
The cyclization of 1,3-bis-silyl enol ethers or (2,4 -dioxobutylidene)triphenylphosphoranes with phthalic dialdehyde allowed a convenient synthesis of a variety of 4,5-benzotropones. The hydrogenation of benzotropones afforded functionalized benzocycloheptanones which were transformed into tricyclic butenolides.
Preparation of 1,2-diacylbenzenes from o-hydroxyaryl ketone acylhydrazones using cross-linked poly[styrene(iodoso diacetate)]
Xian, Huang,Qing, Zhu,Jizheng, Zhang
, p. 2413 - 2418 (2007/10/03)
The 2 percent cross-linked poly[styrene(iodoso diacetate)] was used to synthesis of 1,2-diacylbenzenes, which gave high yields, and could be recycled.
Ultrasound assisted heterogeneous permanganate oxidations
Me?iarova, Mária,Toma, ?tefan,Heribanová, Andrea
, p. 8561 - 8566 (2007/10/03)
The ultrasound effect on the heterogeneous permanganate oxidation of benzyl alcohol and alkylarenes to the corresponding carbonyl compounds is examined. Application of ultrasonic irradiation leads to shorter reaction times as well as lower reaction temperatures. KMnO4 supported by copper sulfate pentahydrate in CH2Cl2 is possible to use for selective oxidation of benzyl alcohol to benzaldehyde. (C) 2000 Elsevier Science Ltd.
Study of the pyrolytic chemistry of isobenzofurylmethyl benzoates
Chen, Ping-Shu,Chou, Chin-Hsing
, p. 17115 - 17126 (2007/10/03)
Pyrolysis of (1-isobenzofuryl)methyl benzoate (9a), produced in situ from flash vacuum pyrolysis of (7-oxa-1-benzonorbornenyl)methyl benzoate (10a), gave methylenebenzocyclobutenone (4), 2-ethynylbenzaldehyde (5) and benzocyclopentadienone (6). The deuterium-labeled study indicated that the mechanism for the formation of these products involved the double migrations of benzoate group in 9a. Pyrolysis of (3-methyl-1-isobenzofuryl)methyl benzoate (9c) gave 1,3-dimethylene-1,3-dihydroisobenzofuran (33), which is stable in benzene and hydrolyzed rapidly in chloroform to give 1,2-diacetylbenzene (35).
Synthesis of 1,2-diacylbenzenes from o-hydroxyaryl ketone acylhydrazones using [(diacetoxy)iodo]benzene
Moriarty,Berglund,Rao
, p. 318 - 321 (2007/10/02)
2'-Hydroxyacetophenone and 2'-hydroxypropiophenone acylhydrazones 3 are oxidized to 1,2-diacylbenzenes 4 using [(diacetoxy)iodo]benzene in dichloromethane at room temperature in a synthetically useful and high yield reaction.
α-Regioselectivity in Palladium-Catalyzed Arylation of Acyclic Enol Ethers
Cabri, Walter,Candiani, Ilaria,Bedeschi, Angelo,Penco, Sergio,Santi, Roberto
, p. 1481 - 1486 (2007/10/02)
Regioselective α-arylation of acyclic enol ethers by aryl trifluoromethanesulfonates, aryl bromide, aryl iodides, and aroyl chlorides is described.The outcome of the reaction proved to be dependent from the relationship between ligand and counterion in the oxidative complex.
OXIDATION OF N-AROYLHYDRAZONES OF o-HYDROXYARYL KETONES WITH LEAD(IV)ACETATE: A FACILE ROUTE TO AROMATIC o-DIKETONES
Kotali, Antigoni,Tsoungas, Petros G.
, p. 4321 - 4322 (2007/10/02)
N-Aroylhydrazones of o-hydroxyaryl ketones are oxidized with lead(IV)acetate to aromatic o-diketones in a synthetically useful reaction.
