Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1982-05-07
1983-07-19
Raymond, Richard
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
564500, C07D30752
Patent
active
043945163
ABSTRACT:
Ranitidine is prepared by reacting cystamine of formula (II) ##STR1## either with a nitroethenamine of formula (III) ##STR2## where L is a leaving group such as alkylthio, e.g. methylthio, or with a compound of formula (IV) ##STR3## where L is a leaving group as defined above, followed by reaction with methylamine, to give a disulphide of formula (V) ##STR4## which is then reacted with 5-[(dimethylamino)methyl]-2-furanmethanol under acid conditions.
REFERENCES:
patent: 4128658 (1975-12-01), Price et al.
patent: 4157340 (1979-06-01), Grenshaw et al.
Glaxo Group Limited
Raymond Richard
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