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Citation: Yang Zhicai, Zhang Xiaowei, Chen Liang. Chiral Copper Complexes for Asymmetric Synthesisof Cyclopropanecarboxylic Esters[J]. Chinese Journal of Applied Chemistry, ;1994, 11(2): 70-72. shu

Chiral Copper Complexes for Asymmetric Synthesisof Cyclopropanecarboxylic Esters

1.
Department of Chemistry, East China Normal University, Shanghai 200062

Received Date: 2 March 1993
Available Online: 20 October 1993
Fund Project:

Three kinds of optically active ligands were combined with copper (Ⅱ)-acetate to give 8 chiral copper complexes:d-camphor-10-sulfonic acid and its derivatives of Schiff base,hydroxypinocamphone and its derivatives of Schiff base,and bis-oxazoline.The optical yields of 2,2-diphenylcyclopropanecarboxylic ethyl ester were 5%~50e.e..The reaction of diphenylethylene or isobutylene with menthyl diazoaceteta by chiral copper (Ⅱ) bis-oxazo-line gave an enantioselectivity of 81.5% e.e.and 95% e.e.,respectively.
- diazoacetate,
- diphenyl ethylene,
- isobutylene,
- cyclopropanation,
- camphorsulfonicacid,
- hydroxypinocamphone,
- bisoxazoline,
- chiral copper complex
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