A range of arylboronicacids undergo a homocoupling reaction in the presence of catalytic amount of gold salts to yield symmetrical biaryls. Alkenylboronic acids, arylboronic esters, and arylborates also participate in the gold-catalyzed homocoupling reaction.
Oxygen-Promoted Pd(II) Catalysis for the Coupling of Organoboron Compounds and Olefins
作者:Young Chun Jung、Rajesh Kumar Mishra、Cheol Hwan Yoon、Kyung Woon Jung
DOI:10.1021/ol034458s
日期:2003.6.1
Reported herein is a mild and efficient Pd(II) catalysis, leading to the formation of carbon-carbon bonds between a broad spectrum of organoboroncompounds and alkenes. Molecular oxygen was employed to reoxidize the resultant Pd(0) species back to Pd(II) during catalytic cycles. This oxygen protocol promoted the desired Pd(II) catalysis, whereas it retarded competing Pd(0) catalytic pathways such as
catalytic strategy: A highly efficient oxidation of a representative series of sec‐alcohols and diols with aq. NaOCl and 2‐azaadamantane N‐oxyl (AZADO) as organocatalyst was combined with a selective ketoreductase‐catalyzed bioreduction. The sequential one‐pot strategy, performed up to 100 mm of final substrate, yields benzyl, non‐benzyl, or hindered biaryl alcohols with very high yield and >99 % ee.
混合催化策略:用仲水高效氧化一系列代表性的仲醇和二醇。NaOCl和2-氮杂金刚烷N-氧基(AZADO)作为有机催化剂与选择性酮还原酶催化的生物还原相结合。连续一锅法在最终基材上进行了长达100 m m的反应,可制得苄基,非苄基或受阻联芳基醇,收率非常高,ee大于99%。
HETEROCYCLIC COMPOUND, AND ORGANIC LIGHT-EMITTING DEVICE USING SAME
申请人:HEESUNG MATERIAL LTD.
公开号:US20190233398A1
公开(公告)日:2019-08-01
The present application provides a hetero-cyclic compound capable of significantly enhancing lifespan, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device containing the hetero-cyclic compound in an organic compound layer.
Encapsulation of a Cr
<sup>III</sup>
Single‐Ion Magnet within an Fe
<sup>II</sup>
Spin‐Crossover Supramolecular Host
作者:Mohanad Darawsheh、Leoní A. Barrios、Olivier Roubeau、Simon J. Teat、Guillem Aromí
DOI:10.1002/anie.201807256
日期:2018.10.8
Single functional molecules are regarded as future components of nanoscale spintronic devices. Supramolecular coordination chemistry provides unlimited resources to implement multiple functions to individual molecules. A novel coordination [Fe2] helicate exhibiting spin‐crossover is demonstrated to be ideally suited to encapsulate a [Cr(ox)3]3− complex anion (ox=oxalate), unveiling for the first‐time