Sumitomo Chemical Company, Limited

Toshitsugi Uemura

Norihiko Hirata

Yasunobu Miyamoto

Mamoru Shirahata

N-tert-butoxycarbonyl-2-pyrrolidinones represented by the following formula (1).  In the formula (1), R1, R2, R3, R4, R5 and R6 independently represent a hydrogen atom, a halogen atom, a cyano group, a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, which may have a substituent, a linear, branched or cyclic alkenyl group having 2 to 10 carbon atoms, which may have a substituent, or the like, R1 and R2 may be linked to form a &#x3e;C&#x2550;O group along with the carbon atom to which both are attached, R3 and R4 may be linked to form a &#x3e;C&#x2550;O group along with the carbon atom to which both are attached, R5 and R6 may be linked to form a &#x3e;C&#x2550;O group along with the carbon atom to which both are attached, or any two among R1, R2, R3, R4, R5 and R6 may be linked to form a polymethylene group having 1 to 4 carbon atoms which may have a substituent.

N-tert-butoxycarbonyl-2-pyrrolidinones and production method thereof

A method of producing 6,6-dimethyl-3 -oxabicyclo [3.1.0]hexan-2-one comprising subjecting a cyclopropane compound of the formula (1): (wherein, Rrepresents an alkyl group, Rrepresents an alkyl group having carbon atom(s) of 1 to 10, a haloalkyl group having carbon atom(s) of 1 to 10, or an aryl group having carbon atoms of 6 to 10 optionally substituted by an alkyl group having carbon atom(s) of 1 to 10, and when Rrepresents the alkyl group, Rand Rare optionally the same or different each other.) to any of the following reactions a), b) and c):

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Toyonaka, Japan

Toshitsugi Uemura