C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
195/129, 260/476
C12P 1/00 (2006.01) C07C 35/06 (2006.01) C07C 45/67 (2006.01) C07D 309/12 (2006.01) C07F 7/18 (2006.01) C12P 7/38 (2006.01) C12P 41/00 (2006.01)
Patent
CA 1066213
ABSTRACT OF THE DISCLOSURE Novel optically active compounds of 4-protected hydroxy- cyclopent-2-en-1-ones of the formula Image (2) wherein R is a splittable protective group for an alcoholic hydroxyl group, and a process for preparing the 4-protected hydroxycyclopent-2-en-1-ones by oxidizing monohydroxy-protected derivatives of cyclopent-1-ene-3,5-diol expressed by the following formula Image (1) wherein R is the same as defined above. Optically active 4- hydroxycyclopent-2-en-1-one which is an optically isomer of the compound of formula (2); or optically active cyclopent-1-en-3,5- diol (R-isomer) and a novel diacyl derivative of the diol, a novel monoacylmonosilyl-derivative of the diol and a novel monoacylmonotetrahydropyranyl-derivative of the diol, which are intermediates for the protective derivative of formula (1). Processes are also provided for preparing the protective derivatives of formula (1) by converting these intermediates by esterification, hydrolysis, enzymatic processes, etc. The optically active compounds of formula (2) are useful as precursors for the prepara- tion of prostaglandin or its analogues.
242574
Ishimoto Sachio
Kobayashi Makiko
Kurozumi Seizi
Matsubara Sadakazu
Miura Shuzi
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