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Citation: Li Zhengning, Chen Huilin, Yu Zhenyuan, Guo Hefu. CATALYTIC CYCLOPROPANATION OF TETRAMETHYL ETHYLENE[J]. Chinese Journal of Applied Chemistry, ;1992, 9(3): 102-105. shu

CATALYTIC CYCLOPROPANATION OF TETRAMETHYL ETHYLENE

1.
Dalian Institute of Chemical Physics, Academia Sinica, Dalian 116023

Corresponding author: Chen Huilin,
Received Date: 6 August 1991
Available Online: 26 November 1991

Cu(Salad)₂, Cu(gly)₂H₂O, Cu(o-NH₂C₆H₄CO₂)₂, Cu(ClO₄)₂6H₂O, Cu(CH₃CN)₄ClO₄ were use first time for catalyzing cyclopropanation of ethyl diazoaeetate (EDA) with tetramethyl ethylene (TME). Cu(Ⅱ) amino acid salts showed no catalytic activity, when they were used directly. High catalytic activity appeared only cohen they were pre-reduccd to Cu(Ⅰ) High TME/EDA ratio, high EDA/Cat ratio, longer addition period of EDA-TME mixture, and high reaction temperature benefited the product yield. Cu(salad)₂ and Cu(gly)₂H₂O showed higher catalytic efficiency for the reaction under suitable conditions.
- copper catalyst,
- tetramethyene,
- ethyl diazoacetate,
- cyclopropanation
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