Synthesis, characterization and application of organorhenium(<scp>vii</scp>) trioxides in metathesis reactions and epoxidation catalysis
作者:Florian Dyckhoff、Su Li、Robert M. Reich、Benjamin J. Hofmann、Eberhardt Herdtweck、Fritz E. Kühn
DOI:10.1039/c8dt02326c
日期:——
l)phenyl]zinc 4a were prepared. The properties and structure of 1b–5 were studied by means of 1H, 13C, 19F and 17O NMR, IR, MS, TGA and elemental analysis. Due to the strong Lewis acidity of the Re(VII) centres crystal structures of complexes 1b and 2b were obtained as THF adducts 1b·THF and 2b·THF. Complexes 1b, 2b, 3b·THF and 5 have been examined as catalysts in olefin epoxidation using cis-cyclooctene
提出了四种类型为L–ReO 3的新型有机or(VII)氧化物:[4-(三氟甲基)苯基]三氧or 1b,[4-(三氟甲氧基)苯基]三氧or 2b,[4-(三氟甲基)四氟苯基]三氧((THF) )3b·THF和(2,2,6,6-四甲基哌啶-1-基)三氧or 5。作为中间产物,制备了新颖的二芳基锌化合物双[4-(三氟甲氧基)苯基]锌2a和双[2,6-双(三氟甲基)苯基]锌4a。通过1 H,13 C,19 F和17研究了1b-5的性质和结构NMR,IR,MS,TGA和元素分析。由于Re(VII)中心的强路易斯酸度,得到了作为THF加合物1b·THF和2b·THF的配合物1b和2b的晶体结构。使用顺式-环辛烯作为模型底物,已经研究了配合物1b,2b,3b·THF和5作为烯烃环氧化反应的催化剂。使用1b,2b和3b·THF,并使用TBHP作为CDCl 3中的氧化剂,可以得到约80%的环氧收率和TOF>