Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1996-12-02
1998-06-23
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 4600
Patent
active
057707740
ABSTRACT:
A method for preparing 2-methyl-1,4-naphthoquinone (vitamin K.sub.3), in which 2-methyl-1,4-benzoquinone and 1,3-butadienes are subjected to a using dimethylsulfoxide as both a dehydrogenating agent and a solvent in the presence of at least one Lewis acid or a Broensted acid, in a single pot, shows high selectivity and yield.
REFERENCES:
Chem Rev 1993, 93, 741-761 Pindur "Acceleration & Selectivity Enhancement of Diels Alder Raction, et".
Liebigs Ann. Chem 1993 905-909 Khanbabaee "Total Synthesis of Hallachrome et al".
Sigma Chem Cataloge 1996 p. 688.
Hwang Kum-Ui
Joo Young J.
Kim Jin-Eok
Won Jeong-Im
Geist Gary
Korea Kumho Petrochemical Co. Ltd.
Vollano Jean F.
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