Sumitomo Chemical Company, Limited

Eichi Murayama

Junki Katsube

Masanao Matsui

Hiromi Shimomura

A process for producing cyclopentane derivatives of the formula ##SPC1## Wherein R is hydrogen or a C.sub.1 to C.sub.6 alkyl group, X is a carboxyl or a carboalkoxy group, and the like; Y and Z each is a hydroxyl group, and the like; and n is an integer of from 5 to 7. The derivatives are useful as medicines. The process of this invention comprises the steps shown in the following reaction scheme: ##SPC2## Wherein R, X, Y, Z and n are as defined above, and wherein R' is lower alkyl group.

Production of cyclopentane derivatives

Cyclopentane derivatives of the formula ##SPC1## Wherein R.sup.1 is a group of the formula

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Tokarazuka, undefined

Eichi Murayama