Entacapone was reacted with phosphorous oxychloride in dry pyridine to yield a phosphate ester. The phosphate promoiety increased aqueous solubility of the parent drug by more than 1700- and 20-fold at pH 1.2 and 7.4, respectively. The phosphate ester provides adequate stability (t(1/2) = 2227 h; pH 7.4) towards chemical hydrolysis, and allowed for release of the parent drug via enzymatic hydrolysis in liver homogenate. (C) 2000 Elsevier Science Ltd. All rights reserved.
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Daiichi Sankyo Co Ltd, Med Chem Res Labs 2, Edogawa Ku, Tokyo 1348630, JapanDaiichi Sankyo Co Ltd, Med Chem Res Labs 2, Edogawa Ku, Tokyo 1348630, Japan
Kagoshima, Yoshiko
Mori, Makoto
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Mori, Makoto
Suzuki, Eiko
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Suzuki, Eiko
Kobayashi, Nobue
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Kobayashi, Nobue
Shibayama, Takahiro
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Shibayama, Takahiro
Kubota, Mikie
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Daiichi Sankyo Co Ltd, Biol Res Labs 4, Edogawa Ku, Tokyo 1348630, JapanDaiichi Sankyo Co Ltd, Med Chem Res Labs 2, Edogawa Ku, Tokyo 1348630, Japan
Kubota, Mikie
Kamai, Yasuki
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Kamai, Yasuki
Konosu, Toshiyuki
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