Chiral <i>cis</i>-Platinum Acetylide Complexes via Diphosphine Ligand Exchange: Effect of the Ligand
作者:Amber L. Sadowy、Michael J. Ferguson、Robert McDonald、Rik R. Tykwinski
DOI:10.1021/om800633h
日期:2008.12.8
Chiral, bidentate phosphine ligands (R,R-CHIRAPHOS, R-PROPHOS, S,S-BDPP, R,R-Me-DUPHOS, R,R-NORPHOS) react with trans-platinum acetylide complexes 1a and 1b, (Ph3P)2Pt(C≡CR)2 (R = TIPS, p-MeC6H4), via ligand exchange to generate chiral platinum acetylide complexes. The corresponding cis-platinum complexes are formed in all cases except for the reaction of 1b with S,S-BDPP, where the dimeric complex
手性二齿膦配体(R,R -CHIRAPHOS,R- PROPHOS,S,S- BDPP,R,R- Me-DUPHOS,R,R- NORPHOS)与反铂乙炔化物络合物1a和1b(Ph 3 P)2 Pt(C≡CR)2(R = TIPS,p -MeC 6 H 4),通过配体交换产生手性的乙炔铂络合物。在所有情况下均形成相应的顺铂络合物,但1b与S,S- BDPP的反应除外,其中二聚体络合物4d'是产品。相反,1a和1b与配体S,S -DIOP,R -BINAP和R -SYNPHOS的反应未能以可观的收率得到所需的产物。圆二色光谱用于检查手性配体对乙炔铂骨架的手性的影响。报道了非手性络合物1a和手性衍生物4e的X射线晶体学分析。