4687-24-5Relevant academic research and scientific papers
Palladium-Catalyzed, Copper(I)-Promoted Methoxycarbonylation of Arylboronic Acids with O-Methyl S-Aryl Thiocarbonates
Cao, Ya-Fang,Li, Ling-Jun,Liu, Min,Xu, Hui,Dai, Hui-Xiong
, p. 4475 - 4481 (2020/04/10)
Here, we report O-methyl S-aryl thiocarbonates as a versatile esterification reagent for palladium-catalyzed methoxycarbonylation of arylboronic acid in the presence of copper(I) thiophene-2-carboxylate (CuTC). The reaction condition is mild, and a variety of substituents including sensitive-Cl,-Br, and free-NH2 could be tolerated. Further applications in the late-stage esterification of some pharmaceutical drugs demonstrate the broad utility of this method.
Tandem Ullmann-Goldberg Cross-Coupling/Cyclopalladation-Reductive Elimination Reactions and Related Sequences Leading to Polyfunctionalized Benzofurans, Indoles, and Phthalanes
Khan, Faiyaz,Fatima, Mehvish,Shirzaei, Moheb,Vo, Yen,Amarasiri, Madushani,Banwell, Martin G.,Ma, Chenxi,Ward, Jas S.,Gardiner, Michael G.
supporting information, p. 6342 - 6346 (2019/08/20)
On exposure to a combination of Cu[I]- and Pd[0]-based catalysts, compounds such as 1 and 7 engage in tandem Ullmann-Goldberg cross-coupling and cyclopalladation-reductive elimination reactions to give benzofurans such as 8. Related reactions involving hetero-Michael additions of o-halogenated phenols or anilines to propiolates and the Pd[0]-catalyzed cyclization of the resulting conjugates provide, in a one-pot process, alternately functionalized benzofurans, indoles, or phthalanes.
Palladium-catalyzed oxidative cyclization of 3-phenoxyacrylates: An approach to construct substituted benzofurans from phenols
Li, Chengliang,Zhang, Yicheng,Li, Pinhua,Wang, Lei
experimental part, p. 4692 - 4696 (2011/07/08)
In this paper, a novel and applicable synthesis of benzofurans from commercially available phenols and propiolate through the direct oxidative cyclization has been developed. In the presence of Pd(OAc)2/PPh 3 and CF3COsub
A simple and practical synthesis of methyl benzo[b]furan-3-carboxylates
Melkonyan, Ferdinand S.,Golantsov, Nikita E.,Karchava, Alexander V.
experimental part, p. 2973 - 2980 (2009/05/31)
A simple and practical two-step procedure for the preparation of 2-unsubstituted l-benzo[b]furan-3-carboxylic acid methyl esters is described. The procedure uses the copper-catalyzed intramolecular C-O bond formation and provides an efficient route to the title compounds in good to excellent yields.
AZABICYCLO-OCTANE INHIBITORS OF IAP
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Page/Page column 42, (2008/06/13)
The invention provides novel inhibitors of IAP that are useful as a therapeutic agents for treating malignancies where the compounds have the general formula (I) in which X1 and X2 are independently O or S; L is a bond or -C(X3
2-Nitrofurans as dienophiles in Diels-Alder reactions
Rosa, Claudia Della,Kneeteman, María N.,Mancini, Pedro M.E.
, p. 8711 - 8714 (2007/10/03)
α-Nitrofuran derivatives are studied in Diels-Alder reactions under thermal conditions. In contrast to α-acylfurans, they proved to be efficient dienophiles.
Palladium assisted substitution of 3-benzo[b]furan triflates
Morice, Christophe,Garrido, Fabrice,Mann, André,Suffert, Jean
, p. 501 - 503 (2007/10/03)
Triflates of 3-coumaranones were prepared, and experimented as coupling partners in palladium catalyzed Stille, Heck, Suzuki, and Sonogashira coupling reactions. The corresponding 3-substituted benzo[b]furans were obtained in excellent yields.
CCK or gastrin modulating benzo ?b!?1,4! diazepines derivatives
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, (2008/06/13)
Benzo?b!?1,4!diazepine compounds of formula (I), where R1 is selected from C1 C6 alkyl, C3 -C6 cycloalkyl, phenyl, or substituted phenyl; R2 is selected from C3 -C6 alkyl, C3 C6 cycloalkyl, C3 -C6 alkenyl, benzyl, phenylC1 -C3 alkyl of substituted phenyl; or NR1 R2 together form 1,2,3,4-tetrahydroquinoline or benzazepine, mono-, di-, or trisubstituted independently with C1-6 alkyl C1-6 alkoxy or halogen substituents; p is an integer 0 or 1; q is an integer 0 or 1; r is an integer 0 or 1; t is an integer 0 or 1, provided that when r is 0 then t is 0; R3, R5, and R6 are independently hydrogen or C1-6 alkyl; R4 is C1-6 alkyl or C1-6 alkenyl; R7 is selected from the group consisting of hydrogen, C1-6 alkyl, C1-6 cycloalkyl, C1-6 alkenyl, phenyl, substituted phenyl, napthyl, heteroaryl, substituted heteroaryl, bicycloheteroaryl or substituted bicycloheteroaryl; or NR6 R7 together form a saturated 5,6, or 7 membered ring optionally interrupted by 1,2,3 or 4 N, S or O heteroatoms, with the proviso that any two O or S atoms are not bonded to each other, m is an integer selected from the group of 0, 1, 2, 3 or 4; R8 and R9 are selected from a variety of substituents; Z is hydrogen or halogen; novel intermediates, a pharmaceutical composition for treating obesity, gall bladder stasis, disorders of pancreatic secretion, methods for such treatment and processes for preparing compounds of formula (I).
BENZOFURAN DERIVATIVES AS D4 RECEPTOR ANTAGONISTS
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, (2008/06/13)
A class of chemical compounds comprising a benzo [b] furan moiety and a substituted heterocyclic moiety, linked via the 3-position of the benzo [b] furan moiety by a methylene group, are antagonists of dopamine receptor subtypes within the brain, being ex
