- K2CO3-Catalyzed Synthesis of 2,5-Dialkyl-4,6,7-tricyano-Decorated Indoles via Carbon-Carbon Bond Cleavage
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We describe a novel method to synthesize 2,5-dialkyl-4,6,7-tricyanoindole derivatives from a base-catalyzed reaction of 1,3-diketones with fumaronitrile. The reaction proceeds by the condensation of two molecules of fumaronitrile and one molecule of 1,3-diketone in a remarkable process that involves the cleavage of one C(sp3)-C(sp2) bond in 1,3-diketones and the formation of one carbon-nitrogen bond and four carbon-carbon bonds to construct both the aryl and pyrrole rings of the indole in one step.
- Pike, Ryan A. S.,Sapkota, Rishi R.,Shrestha, Bijay,Dhungana, Roshan K.,Kc, Shekhar,Dickie, Diane A.,Giri, Ramesh
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supporting information
p. 3268 - 3272
(2020/04/10)
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- Synthesis of sterically hindered 1,3-diketones
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An efficient and practical method for the synthesis of sterically hindered aliphatic/aromatic 1,3-diketones via coupling of ketones with esters using potassium tert-butoxide is described. The protocol requires milder operating conditions, and the products are obained in good to excellent yields. Copyright Taylor & Francis Group, LLC.
- Nandurkar, Nitin S.,Bhanushali, Mayur J.,Patil, Dinkar S.,Bhanage, Bhalchandra M.
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p. 4111 - 4115
(2008/03/13)
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- PROCESSES FOR PREPARING β-DIKETONE COMPOUND, METAL COMPLEX THEREOF AND METALLIC COMPOUND
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Disclosed is a process for preparing a β-diketone compound such as 2,6-dimethyl-3,5-heptanedione, which comprises reacting an ester compound such as an alkyl isobutyrate with a ketone compound such as 3-methylbutanone in the presence of an alkali metal alkoxide as a catalyst. The process comprises a step 1 in which an ester compound CR1R2R3COOQ is reacted with a ketone compound CR4R5R6COCH2R7 using an alkali metal alkoxide catalyst to give a β-diketone compound CR1R2R3COCHR4R5R6. (In the formulae, R7 is hydrogen or an alkyl group of 1 to 4 carbon atoms while others are each independently hydrogen or an alkyl group of 1 to 3 carbon atoms, and at least one of R1 to R6 is hydrogen.)
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Page/Page column 26
(2008/06/13)
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- Indium source reagent compositions, and use thereof for deposition of indium-containing films on substrates and ion implantation of indium-doped shallow junction microelectronics structures
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An indium precursor composition having utility for incorporation of indium in a microelectronic device structure, e.g., as an indium-containing film on a device substrate by bubbler or liquid delivery MOCVD techniques, or as a dopant species incorporated in a device substrate by ion implantation techniques. The precursor composition includes a precursor of the formula R1R2InL wherein: R1and R2may be same or different and are independently selected from C6-C10aryl, C6-C10fluoroaryl, C6-C10perfluoroaryl, C1-C6alkyl, C1-C6fluoroalkyl, or C1-C6perfluoroalkyl; and L is β-diketonato or carboxylate. Indium-containing metal films may be formed on a substrate, such as indium-copper metallization, and shallow junction indium ion-implanted structures may be formed in integrated circuitry, using the precursors of the invention.
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- Group II MOCVD source reagents, and method of forming Group II metal-containing films utilizing same
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Novel Group II metal MOCVD precursor compositions are described having utility for MOCVD of the corresponding Group II metal-containing films. The complexes are Group II metal β-diketonate Lewis base adducts having ligands such as: (i) amines bearing terminal NH2 groups; (ii) imine ligands formed as amine (i)/carbonyl reaction products; (iii) combination of two or more of the foregoing ligands (i)-(ii), and (iv) combination of one or more of the foregoing ligands (i)-(ii) with one or more other ligands or solvents. The source reagent complexes of barium and strontium are usefully employed in the formation of barium strontium titanate and other Group II doped thin-films on substrates for microelectronic device applications, such as intearated circuits, ferroelectric memories, switches, radiation detectors, thin-film capacitors, microelectromechanical structures (MEMS) and holoaraphic storage media.
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