and representative complexes Ru (PBTNNNHN)Cl2(PPh3) (2a), Ru (PBTNNNMeN)Cl2(PPh3) (2b), and Ru (PBTNNSN)Cl2(PPh3) (2f) have been characterized by NMR spectroscopy, high‐resolution mass spectroscopy, and Fourier transform infrared (FT‐IR). The molecular structures of 1f, 2a, and 2f have been determined by X‐ray diffraction study. The results indicate that PBTNNNHN ligand in the complex presented coplanar
衍生自具有不同连接子的2-(吡啶-2-基)苯并[d]噻唑(PBT)的六齿三齿NNN配体前体PBT NN X N(X = NH,NMe,O,S)(1a – 1f)具有已经准备好了。PBT NN X N配体的电子性质可通过PBT骨架和吡啶环之间的不同连接基和/或通过在吡啶环上引入给电子/吸电子基团(R = OMe或F)很好地调节。配体前体和代表性络合物Ru(PBT NN NH N)Cl 2(PPh 3)(2a),Ru(PBT NNNMe N)Cl 2(PPh 3)( 2b)和Ru( PBT NN S N)Cl 2(PPh 3)( 2f)的特征已通过NMR光谱,高分辨率质谱和傅立叶变换红外(FT- IR)。1f, 2a和2f的分子结构已通过X射线衍射研究确定。结果表明,复合物中的PBT NN NH N配体与两个五元螯合环共面。应该注意的是2a与其他连接子(如NMe,O或S)相比,具有NH基团的分
Palladium-Catalyzed <i>para</i>-Selective Allylation of 1-(Cyanomethyl)arenes with Allyl Acetates
The Pd/PMe3-catalyzed allylation of 1-(cyanomethyl)naphthalenes with allyl acetates proved to be para- rather than α-regioselective. This reaction is thought to proceed through ligand attack of the para-carbon in the arenes, electronically enriched by a cyano-stabilized α-carbanion, to the (π-allyl)palladium and a 1,5-hydrogen shift of the para-hydrogen from the dearomatized intermediate.
Synthesis of β-Substituted Naphth-1-yl Ethylamido Derivatives as New Melatoninergic agonists
作者:Monique Mathé-Allainmat、Marie Le Gall、Carole Jellimann、Jean Andrieux、Michel Langlois
DOI:10.1016/s0968-0896(99)00236-9
日期:1999.12
Naphthalene melatoninergic ligands with alkyl groups (Me, Et, Pr, Bz) in the beta position of the ethylamido chain were synthesised. The affinity of the compounds for chicken brain melatonin receptors was evaluated using 2-[I-125]-iodomelatonin as the radioligand. An increase in the affinity was observed with the beta-methyl derivatives and the greatest increase was seen with the (-) enantiomers. The introduction of a 2- or 7-MeO group on the naphthalene ring and the lengthening (Et, Pr) of the alkylamido chain gave potent compounds such as (-)1h (K-i = 24 pM). The functional activity of these compounds was evaluated by the aggregation of melanophores in Xenopus laevis tadpoles. The potency to produce lightening of the skin of Xenopus laevis was related to the affinities values of the molecules at melatonin chicken brain receptors. The most potent ligands were found to be full agonists and compound 1h was 25 fold more potent than melatonin in this bioassay. (C) 1999 Elsevier Science Ltd. All rights reserved.
Reduction and Benzylation by Means of Benzyl Alcohol. V. A New Synthesis of α,β-Diarylpropionic Acids and the Corresponding Nitriles<sup>1</sup>
作者:Moshe Avramoff、Yaër Sprinzak
DOI:10.1021/ja01535a059
日期:1958.1
MAKOSZA M.; LUDWIKOW M.; URNIAZ A., ROCS. CHEM. <ROCH-AC>, 1975, 49, NO 2, 297-306