TETRAZINE-CONTAINING COMPOUNDS AND SYNTHETIC METHODS THEREOF
申请人:The Regents of the University of California
公开号:US20160223559A1
公开(公告)日:2016-08-04
Described herein are tetrazine derivatives and efficient synthetic methods of synthesis thereof using elimination-Heck cascade reaction. Provided herein is the synthesis of conjugated tetrazines from the tetrazine derivatives. Also provided herein are methods of use of the conjugated tetrazines as fluorogenic probes for live-cell imaging.
New naphthalene complexes of Ru(0) with various Ru(η6-naphthalene)(cyclic diene) (3) ligands catalyze linear cross-dimerization between conjugated dienes and acrylates. One of the noteworthy catalysts is the dibenzocyclooctatetraene complex 3d, which shows high catalytic activity for the cross-dimerization between 1,3-pentadiene and methyl acrylate to give the cross-dimers in 99% yield (branch/linear
From 0 to II in One‐Electron Steps: A Series of Ruthenium Complexes Supported by TropPPh
<sub>2</sub>
作者:Xiuxiu Yang、Thomas L. Gianetti、Joshua Harbort、Michael D. Wörle、Lilin Tan、Cheng‐Yong Su、Pascal Jurt、Jeffrey R. Harmer、Hansjörg Grützmacher
DOI:10.1002/anie.201605687
日期:2016.9.19
We report the synthesis of a series of rutheniumcomplexes supported by the phosphine olefin ligand tropPPh2 (trop=5‐H‐dibenzo‐[a,d]cyclohepten‐5‐yl) in the oxidation states 0, +I, and +II, formed via successive one‐electron oxidization steps from Ru0(tropPPh2)2. The bidentate character of the tropPPh2 ligand and its steric hindrance force the complexes to adopt uncommon geometries, which were investigated
(BQ)-assisted methoxycarbonylation of terminal alkynes to give chemoselectively the corresponding alkynylcarboxylic acid methyl ester with high TOF (up to 980 h−1). Unlike 2a/b, the PdII-(tosylate)-diphosphane complexes [Pd(OTs)(H2O)(dppp)](OTs) 2c (dppp = 1,3-bis-di(phenylphosphanyl)propane and [Pd(H2O)2(MeO-dppp)](OTs)22d (MeO-dppp = 1,3-bis(di(2-methoxyphenyl)phosphanyl)propane) preferentially catalyzed
Selective anion effects in chiral complexes of iridium via diffusion and HOESY data: relevance to catalysisElectronic supplementary information (ESI) available: spectroscopic data for 6b. See http://www.rsc.org/suppdata/cc/b1/b110066c/
作者:Daniela Drago、Paul S. Pregosin、Andreas Pfaltz
DOI:10.1039/b110066c
日期:2002.1.30
1H and 19F Pulsed Gradient Spin Echo (PGSE)
diffusion data, together with 1H, 19F-HOESY results are
shown to distinguish between different types of anion/cation interactions in
chiral dihydrido-P,N-complexes of Ir(III); in CD2Cl2
the diffusion coefficients, D, for the BArF and the Ir-cation suggest
ion-pairing whereas the D-values for PF6−
reveal independent motion; the PF6− approaches the
cation via a specific pathway; the combined PGSE/HOESY approach offers
a unique opportunity for exploring anion effects in organometallic/catalytic
chemistry.
1H 和 19F 脉冲梯度自旋回波(PGSE)扩散数据以及 1H、19F-HOESY 结果表明,Ir(III) 的手性二氢-P,N-络合物中阴离子/阳离子相互作用的类型各不相同;在 CD2Cl2 中,BArF 和 Ir 阳离子的扩散系数 D 表明离子配对,而 PF6- 的 D 值则显示出独立运动;PF6- 通过特定途径接近阳离子;PGSE/HOESY 组合方法为探索有机金属/催化化学中的阴离子效应提供了独特的机会。