55359-67-6Relevant articles and documents
Ni-Catalyzed Cycloisomerization between 3-Phenoxy Acrylic Acid Derivatives and Alkynes via Intramolecular Cleavage and Formation of the C-O Bond to Give 2,3-Disubstituted Benzofurans
Ohno, Shohei,Qiu, Jiawei,Miyazaki, Ray,Aoyama, Hiroshi,Murai, Kenichi,Hasegawa, Jun-Ya,Arisawa, Mitsuhiro
supporting information, p. 8400 - 8403 (2019/10/14)
Reactions based on transition-metal-catalyzed C-O bond cleavage have attracted much attention as a new synthetic method. Until now, several intermolecular reactions via C-O bond cleavage of aryl ethers, alkenyl ethers, esters, and others have been reported. Here we report an unprecedented C-O bond cleavage of 3-phenoxy acrylic acid derivatives, followed by intramolecular C-O bond formation with alkynes. This reaction gave 2,3-disubstituted benzofurans having useful functional groups-silyl substituents and acrylic acid derivatives- A t the 2- A nd 3-positions, respectively. This report also described theoretical (DFT) insights into the mechanism.
Expanding the Reactivity of Donor-Acceptor Cyclopropanes: Synthesis of Benzannulated Five-Membered Heterocycles via Intramolecular Attack of a Pendant Nucleophilic Group
Ivanova, Olga A.,Andronov, Vladimir A.,Vasin, Vladimir S.,Shumsky, Alexey N.,Rybakov, Victor B.,Voskressensky, Leonid G.,Trushkov, Igor V.
supporting information, p. 7947 - 7952 (2019/01/04)
Lewis-acid-induced domino transformations of donor-acceptor cyclopropanes, possessing a nucleophilic center embedded in a donor group, into functionalized 2,3-dihydrobenzo[b]furans and 2,3-dihydrobenzo[b]thiophenes are reported herein. An unusual switch o
Enantioselective synthesis of multisubstituted biaryl skeleton by chiral phosphoric acid catalyzed desymmetrization/kinetic resolution sequence
Mori, Keiji,Ichikawa, Yuki,Kobayashi, Manato,Shibata, Yukihiro,Yamanaka, Masahiro,Akiyama, Takahiko
supporting information, p. 3964 - 3970 (2013/04/24)
Described herein is the enantioselective synthesis of multisubstituted biaryl derivatives by chiral phosphoric acid catalyzed asymmetric bromination. Two asymmetric reactions (desymmetrization and kinetic resolution) proceeded successively to afford chiral biaryls in excellent enantioselectivities (up to 99% ee). Both experimental and computational studies suggested that this excellent selectivity could be achieved via a highly organized hydrogen bond network among a substrate, a catalyst (chiral phosphoric acid), and a brominating reagent (N-bromophthalimide).
Expeditious synthesis of benzopyrans via lewis acid-catalyzed C-H functionalization: Remarkable enhancement of reactivity by an ortho substituent
Mori, Keiji,Kawasaki, Taro,Sueoka, Shosaku,Akiyama, Takahiko
supporting information; experimental part, p. 1732 - 1735 (2010/09/05)
An expeditious construction of a benzopyran skeleton via Lewis acid-catalyzed C-H functionalization was achieved. In this process, a [1,5] hydride shift and 6-endo cyclization successively occurred to give benzopyrans. The presence of substituents ortho to the alkoxy group significantly enhanced the reactivity, affording the desired compounds in excellent chemical yields with short reaction times.
Salicylaldimine-aluminum complexes for the facile and efficient ring-opening polymerization of ε-caprolactone
Nomura, Nobuyoshi,Aoyama, Takuji,Ishii, Ryohei,Kondo, Tadao
, p. 5363 - 5366 (2008/02/01)
A facile and efficient catalytic system of salicylaldimine-aluminum complexes for the ring-opening polymerization (ROP) of ε-caprolactone (CL) was investigated. The polymerization of Cl was examined at 25 °C in the presence of 1 mol % of benzyl alcohol (B
3-PHENOXY-4-PYRIDAZINOL DERIVATIVE AND HERBICIDE COMPOSITION CONTAINING THE SAME
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Page 302, (2008/06/13)
A compound represented by the formula: wherein R1 represents a hydrogen atom, a halogen atom, alkyl group, etc., ???R2 represents a hydrogen atom, a halogen atom, alkyl group, etc., ???R3, R4, R5, R6 and R7 each independently represent a hydrogen atom, a halogen atom, a substitutable alkyl group, a substitutable alkenyl group, alkynyl group, a substitute-able cycloalkyl group, etc., or adjacent two of R3, R4, R5, R6 and R7 may together with the carbon atoms to which the respective substituents are bonded form a ring which may be substituted, ???m and n each independently represent 0 or 1, a salt thereof or an ester derivative thereof; an agricultural chemical containing the same as an active ingredient; and a herbicidal composition containing the compound and a second herbicidally active compound as active ingredients.
