Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1983-01-12
1985-04-23
Chan, Nicky
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
544 27, 544 28, C07D31122
Patent
active
045131457
ABSTRACT:
A novel 2-methylchromone derivative represented by the general formula: ##STR1## wherein R.sub.1 means a hydrogen atom or a lower alkanoyl group. The above derivative is a useful intermediate for the synthesis of cephem activities, which are also effective against infections of the urinary tract, etc. A preparation process of the above chromone derivative is also disclosed.
REFERENCES:
patent: 4309354 (1982-01-01), Nomoto et al.
patent: 4331606 (1982-05-01), Nomoto et al.
Kamiya Takashi
Kitoh Kyosuke
Machida Yoshimasa
Negi Shigeto
Nomoto Seiichiro
Chan Nicky
Eisai Co. Ltd.
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