Otsuka

Y. Otsuka and co-workers. Organic Coat. Tlast. Chem. 40, 382 (1979). 

J. Jaques, A. CoUet, and S. WiUen, Enantiomers, Racemate, and Resolutions,]o m Wiley Sons, Inc., New York, 1981 The Chemical Society of Japan, eds., Kikan Kagaku Sosetsu (No. 6, Resolution of Optical Isomers), Gakkai Shuppan Senta, Tokyo, Japan, 1989 G. C. Barrett ia Ref. 1, Chapt. 10, pp. 338—353 S. Otsuka and T. Mukaiyama, Progress of ylsymmetric Synthesis and Optical Resolution (ia Japanese), Kagaku Dojia, Kyoto, Japan, 1982. 

OA-7653A, B Streptomyces hygroscopicus subsp. hiwasaensis ATCC 31613 1978 Otsuka Pharmaceutical 37,38... 

Maltol. Otsuka Chemical Co. in Japan has operated several electroorganic processes on a small commercial scale. It has used plate and frame and aimular cells at currents in the range of 4500—6000 A (133). The process for the synthesis of maltol [118-71 -8], a food additive and flavor enhancer, starts from furfural [98-01-1] (see Food additives Flavors and spices). The electrochemical step is the oxidation of a-methylfurfural to give a cycHc acetal. The remaining reaction sequence is acid-catalyzed ring expansion, epoxidation with hydrogen peroxide, and then acid-catalyzed rearrangement to yield maltol, ie ... 

K. Otsuka and co-workers in Proceedings of the International Electronic Packaging Society, Des Plaines, lU., 1986, p. 720. 

K. Otsuka and co-workers, IEEE Trans. Comp. Hybrids Manuf. Technol CHMT-12 (1987). 

Mochida, I., Shimizu, K.., Korai, Y., Otsuka, H. and Fujiyama, S., Structure and carbonization properties of pitches produced catalytically from aromatic hydrocarbons with HF/BFj, Carbon, 1988, 26(6), 843 852. 

Otsuka K-76, a fungal product with strong anticomplement activity, was synthesized from the A/B bicyclic precursor of stemodin. The aromatic subunit was retrosynthetically disconnected to a symmetrical precursor. A surprising non-selectivity of olefinic hydroxylation by osmium tetroxide was noted. 

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