ASYMMETRIC CATALYSIS .80. AN OPTICALLY-ACTIVE TETRAKISPYRAZOLYLBORATE - SYNTHESIS AND USE IN CU-CATALYZED ENANTIOSELECTIVE CYCLOPROPANATION

被引：40

作者：

BRUNNER, H

SINGH, UP

BOECK, T

ALTMANN, S

SCHECK, T

WRACKMEYER, B

机构：

[1] Institut für Anorganische Chemie, Universität Regensburg, W-8400 Regensberg

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1993年 / 443卷 / 01期

关键词：

D O I：

10.1016/0022-328X(93)80027-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis of the optically-active sodium salt of tetrakis(4,5,6,7-tetrahydro-7,8,8-trimethyl-2H-4,7-methanoindazolyl)borate, [NaB-(camphpz)4] (1) is reported. Cu-based in situ catalysts containing [NaB(camphpz)4] give an enantiomeric excess of up to 62% in the enantioselective cyclopropanation of styrene with ethyl diazoacetate.

引用

页码：C16 / C18

页数：3

共 15 条

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[8] BORON-PYRAZOLE CHEMISTRY .2. POLY(1-PYRAZOLYL) BORATES
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[9] POLYPYRAZOLYLBORATES, A NEW CLASS OF LIGANDS
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