Facile reductive coupling of benzylic halides with ferrous oxalate dihydrate
作者:Jitender M. Khurana、Sushma Chauhan、Golak C. Maikap
DOI:10.1039/b211792d
日期:2003.5.15
Facile reductive coupling of benzylic halides is reported with ferrous oxalate dihydrate in DMF or HMPA under nitrogen atmosphere at 155–160 °C. The coupling is proposed to proceed by two successive oxidative additions of benzylic halides to ferrous oxalate to give an intermediate organoiron complex which undergoes concerted dimerization to give the corresponding reductively coupled dimers in high yields.
Luminescent tungsten(<scp>vi</scp>) complexes as photocatalysts for light-driven C–C and C–B bond formation reactions
作者:Daohong Yu、Wai-Pong To、Glenna So Ming Tong、Liang-Liang Wu、Kaai-Tung Chan、Lili Du、David Lee Phillips、Yungen Liu、Chi-Ming Che
DOI:10.1039/d0sc01340d
日期:——
gram-scale is described. This complex could catalyse photochemical organic transformation reactions including borylation of aryl halides, such as aryl chloride, reductive coupling of benzyl bromides for C–C bond formation, reductive coupling of phenacyl bromides, and decarboxylative coupling of redox-active esters of alkyl carboxylic acid with high product yields and broad functional group tolerance.
光催化在实际合成应用中的实现取决于开发可大规模制备的廉价光催化剂。本文描述了一种空气稳定、吸收可见光的光致发光钨 ( VI ) 配合物,可以方便地以克级制备。该配合物可催化光化学有机转化反应,包括芳基卤化物(如芳基氯)的硼化反应、苄基溴还原偶联以形成 C-C 键、苯酰溴的还原偶联以及烷基羧酸的氧化还原活性酯与高产率和广泛的官能团耐受性。
Photoredox-Catalysis-Modulated, Nickel-Catalyzed Divergent Difunctionalization of Ethylene
photoredox catalysis. Mechanistic studies suggest that the observed selectivity was due to different active states of Ni(I) and Ni(0) modulated by Ru- and Ir-based photoredox catalysts, respectively. The ability to access different organometallic oxidation states via photoredox catalysis promises to inspire new perspectives for synergistic transition-metal-catalyzed divergent synthesis.
on visible-light-mediated Co/Ru dual catalysis. The key feature involves the photochemical oxidation of an organocobalt(III) intermediate derived from hydrogen atom transfer, which is supported by electrochemical analysis, quenching studies, and stoichiometric experiments. This redox process enables the efficient branch-selective alkylation of pharmaceutically important nucleophiles (phenols, sulfonamides
Studien über Konstitution und Wirkung von relativ apolaren, lipoïdaffinen Kontaktinsektiziden. 3. Mitteilung. Cyclopropanderivate
作者:V. Biro、W. Voegtli、Paul Läuger
DOI:10.1002/hlca.19540370738
日期:——
Wirkung verantwortlich sei und die Trichlormethylgruppe die Lipoïdaffinität der Gesamtmolekel erhöhe, wurde, in Anlehnung an die Meyer-Overton'sche Theorie der Narkotika, die Trichlormethylgruppe durch Cycloalkangruppen, speziell die Cyclopropylgruppe ersetzt. Auch weitere Cyclopropanderivate, insbesondere 1,1-Diphenyl- und 1,2-Diphenyl-cyclopropan-Abkömmlinge werden beschrieben und deren insektizide Wirkung
Ausgehend冯明镜ArbeitshypotheSE,DASS在DER DDT-GRUPPE DAS p,p'-二substituierte Diphenylmethansystem在erster临界线献给inSEktizide Wirkung verantwortlich SEI UND模模具TrichlormethylgrUPpe死LipoïDAffinitätDER Gesamtmolekelerhöhe,wurde,在Anlehnung一个模具迈耶-奥弗顿“血清胆碱酯酶Theorie DER纳尔科蒂卡(Narkotika),三环甲基丙烯酸酯(CycloalkangrUPpen),三环甲基丙烯酸酯(TrichloromethylgrUPpe),环糊精(SEpziell),环糊精(CyclopropylgrUPpe erSEtzt)。诸如1,2-二苯基环丙烷和1,2-二苯基-环丙烷-Abkömmlingewerden