937-41-7Relevant articles and documents
Development of n-type semiconductor based on cyclopentene- or cyclohexene-fused [C60]-fullerene derivatives
Yamane, Yu,Sugawara, Kiyotaka,Nakamura, Naoshi,Hayase, Shuichi,Nokami, Toshiki,Itoh, Toshiyuki
, p. 4638 - 4649 (2015)
Properties of cyclopentene- or cyclohexene-fused [C60]-fullerene derivatives as the acceptor in photovoltaic cells have been investigated by use of poly(3-hexylthiophene) (P3HT) as the model donor polymer. Several cyclopentene- or cyclohexene-fused [C60]-fullerene derivatives show high power conversion efficiency (PCE). The highest PCE was obtained for 3′,6′-dihydro-4′-phenoxycarbonyl-6′-methylbenzo[1,9][5,6](C60-Ih)fullerene (3.2%); this is superior to that of [C60]-PCBM with the P3HT polymer under the same experimental conditions. PCE of the OPV devices with alkyl-substituted cyclohexene-fused [C60]-fullerenes depended on the alkyl substituent on the cyclohexene ring; compounds with substituents of odd-number alkyl groups showed better PCE than those compounds possessing even-number alkyl groups.
Acid- And base-switched palladium-catalyzed γ-C(sp3)-H alkylation and alkenylation of neopentylamine
Zhang, Jinquan,Zhang, Shuaizhong,Zou, Hongbin
supporting information, p. 3466 - 3471 (2021/05/31)
The functionalization of remote unactivated C(sp3)-H and the reaction selectivity are among the core pursuits for transition-metal catalytic system development. Herein, we report Pd-catalyzed γ-C(sp3)-H-selective alkylation and alkenylation with removable 7-azaindole as a directing group. Acid and base were found to be the decisive regulators for the selective alkylation and alkenylation, respectively, on the same single substrate under otherwise the same reaction conditions. Various acrylates were compatible for the formation of C(sp3)-C(sp3) and C(sp3)-C(sp2) bonds. The alkenylation protocol could be further extended to acrylates with natural product units and α,β-unsaturated ketones. The preliminary synthetic manipulation of the alkylation and alkenylation products demonstrates the potential of this strategy for structurally diverse aliphatic chain extension and functionalization. Mechanistic experimental studies showed that the acidic and basic catalytic transformations shared the same six-membered dimer palladacycle.
Palladium-catalyzed regioselective synthesis of B(4,5)-or B(4)-substituted: O-carboranes containing α,β-unsaturated carbonyls
Li, Jiaoyi,Lu, Jian,Tian, Song,Wang, Qian,Zhang, Chuyi,Zhang, Jianwei,Zhou, Ling
, p. 4723 - 4727 (2020/07/13)
With the help of a carboxylic acid directing group, Pd-catalyzed regioselective synthesis of B(4,5)-or B(4)-substituted o-carboranes containing α,β-unsaturated carbonyls has been reported. The-COOH, removed during the course of the reaction, is responsible for controlling the regioselectivity. The desired products could be obtained in moderate to good yields.
Kinetic studies of conjugate addition of amines to allenic and acrylic esters and their correlation with antibacterial activities against Staphylococcus aureus
Kiattisewee, Cholpisit,Kaidad, Angkit,Jiarpinitnun, Chutima,Luanphaisarnnont, Torsak
, p. 1059 - 1068 (2018/02/26)
Abstract: Kinetic reactivities of various allenic and acrylic esters in conjugate addition reactions with various amines were investigated. Competition experiments showed that amines reacted selectively with allenic esters, which was also confirmed by quantitative determination of the rate constants. The antibacterial activity against Staphylococcus aureus of allenic and acrylic ester derivatives were also determined. Allenic esters were found to exhibit a higher antibacterial activity than its acrylic counterparts. A correlation between the kinetic property and the antibacterial activity suggested that a conjugate addition may involve in the antibacterial mechanism of these unsaturated esters. Graphical abstract: [Figure not available: see fulltext.].
