BIS(BINAPHTHYLCYCLOPENTADIENYL)-DERIVED METALLOCENE PEROXIDE COMPLEXES - CATALYSTS FOR THE ENANTIOSELECTIVE EPOXIDATION OF UNFUNCTIONALIZED ALKENES

被引：28

作者：

COLLETTI, SL ^{[1
]}

HALTERMAN, RL ^{[1
]}

机构：

[1] UNIV OKLAHOMA,DEPT CHEM & BIOCHEM,620 PARRINGTON OVAL,NORMAN,OK 73019

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1993年 / 455卷 / 1-2期

关键词：

D O I：

10.1016/0022-328X(93)80387-Q

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The enantioselective catalytic epoxidation of unfunctionalized alkyl and aryl olefins was conducted using titanocene and niobocene peroxide complexes incorporating a C2-symmetrical binaphthylcyclopentadienyl ligand (BpDMCp). Enantiomeric excesses up to 20% and activities up to 55 turnovers were obtained with the application of our chiral bis(binaphthylcyclopen-tadienyl)-derived metallocenes. A significant decrease in the enantioselectivity for the epoxidation of trans-3-hexene was observed when the metal was changed from titanium to niobium in these binaphthyl-derived C2-symmetrical complexes. The preparation of the bis(binaphthylcyclopentadienyl)-chloroniobium peroxide complexes and bis(indenyl)chloroniobium peroxide is described.

引用

页码：99 / 106

页数：8

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