and cyclohexane) and the relative rate of O—H insertion into methanol to stereospecific cyclopropanation of the olefin to C—H insertion into cyclohexane are calculated from the ratios of products and substrates. It is found (i) that the reactivities of the substrates decrease in the order of methanol, olefin and cyclohexane and (ii) that electron-donating substituents generally lead to reaction with
Synthesis of quinolinyl-based pincer copper(<scp>ii</scp>) complexes: an efficient catalyst system for Kumada coupling of alkyl chlorides and bromides with alkyl Grignard reagents
作者:Hanumanprasad Pandiri、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1039/c8dt03210f
日期:——
yield. All complexes 2–5 were characterized by elemental analysis and HRMS measurements. Furthermore, the molecular structures of 2, 3 and 4 were elucidated by X-ray crystallography. Complex 4 crystallizes in a dimeric and catemeric pattern. The cationic complex 5 was found to be an efficient catalyst for the Kumada coupling reaction of diverse nonactivated alkylchlorides and bromides with alkyl magnesium
基于Quinolinamide-钳形铜(II)配合物,κ Ñ,κ Ñ,κ ñ - C 9 ħ 6 N-(μ-N)-C(O)CH 2净2 }的CuX [(Q NNN的Et 2)的CuX (X = Cl,2 ; X = Br,3 ; X = OAc,4)],是通过配体(Q NNN Et 2)-H(1)与CuX 2(X = Cl,Br或OAc )反应合成的)在Et 3 N存在下。(Q NNN Et 2)-H用的CuX(X = Cl,Br或OAC)也得到的Cu(II)配合物2,3和4分别,而不是预期的Cu(我)钳形络合物。由Cu(I)前体形成Cu(II)络合物最可能是通过Cu(I)歧化成Cu(0)和Cu(II)的反应而发生的。通过用AgOTf处理中性络合物2,合成了阳离子络合物[(Q NNN Et 2)Cu(CH 3 CN)] OTf(5)。另一方面,(Q NNN Et 2)-H( 1)与[Cu(MeCN)