Bulletin of the Chemical Society of Japan

Reaction of reduced PQQ (PQQH2) and molecular oxygen.

S Itoh, Y Ohshiro, T Agawa

Index: Itoh, Shinobu; Ohshiro, Yoshiki; Agawa, Toshio Bulletin of the Chemical Society of Japan, 1986 , vol. 59, # 6 p. 1911 - 1914

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Citation Number: 49

Abstract

Reduced PQQ (PQQH 2) is prepared by the reaction of PQQ with thiophenol, 1-benzyl-1, 4- dihydronicotinamide (BNAH), sodium dithionite, or sodium borohydride. Oxidation of PQQH 2 to PQQ by molecular oxygen in aqueous solutions is investigated kinetically. The oxidation is accelerated gradually with proceeding of the reaction, which may be attributed to the side reaction of PQQH 2 and H 2 O 2 produced by the reaction of PQQH 2 and O 2. As in fact, ...

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