Sumitomo Chemical Company, Limited

Ryo Minamida

Koji Hagiya

Makoto Itagaki

Kouji Yoshikawa

Katsuhisa Masumoto

A method for producing a purified formylcyclopropane compound represented by the formula (1) comprising (A) a step of reacting a crude formylcyclopropane compound represented by the formula (1):  

Method for producing purified formylcyclopropane compound and intermediate of such formylcyclopropane compound

A process for production of a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester comprising:

Process for production of trans-2, 2-dimethyl-3-formylcyclopropanecarboxylic acid ester

A process for producing an optically active cyclopropane compound represented by the formula (4): wherein R, R, Rand Rare the same or different, and represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, and so on; and Rrepresents a C1-6 alkyl group; and * represents an asymmetric carbon atom, wherein R, R, R, and Rare as described above, wherein Rrepresents a hydrogen atom, a C1-6 alkyl group, and so on; Rrepresents a C1-6 alkyl group and so on; and n represents an integer of 0 to 3; provided that, two Rs may be bonded each other together with the carbon atom to which they are bonded to form a ring; and * represents an asymmetric carbon atom,

Process for producing optically active cyclopropane compound and asymmetric copper complex for use in the same

A method for producing an optically active cyclopropanecarboxylate compound represented by the formula (5): wherein R, R, Rand Rrepresent a C1-C6 alkyl group or the like and Rrepresents a C1-C6 alkyl group,which comprises reacting an olefin represented by the formula (3): wherein R, R, Rand Rare as described above,with a diazoacetic acid ester represented by the formula (4):NCHCOR&#x2003;&#x2003;(4)wherein Ris as described above,in the presence of an asymmetric copper complex obtained by mixing 

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Kyotanabe, Japan

Ryo Minamida