Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2004-06-16
2008-11-04
Shameem, Golam M (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C548S452000, C548S454000
Reexamination Certificate
active
07446212
ABSTRACT:
The invention provides novel compounds useful as intermediates for the production of polymethine compounds containing a desired counter ion with high purity and in high yields.Thus provided are polymethine ether compounds of the general formula (I) given below and a method of producing polymethine compounds which comprises bringing those compounds into contact with an acid.In the above formula, R represents an alkyl group, an alkoxyalkyl group or an aryl group which may optionally be substituted, R1and R2each independently represents a hydrogen atom, halogen atom, nitro group, alkyl group, alkoxyalkyl group, alkoxy group or alkoxyalkoxy group and R1and R2may be bound to each other to form a ring; R3represents an alkyl group, which may optionally be substituted; L is an alkylene group required for the formation of a ring structure; and X represents a hydrogen atom, halogen atom, alkoxy group, aryloxy group, alkylthio group, arylthio group or substituted amino group.
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Chichiishi Keiki
Fujita Shigeo
Sasaki Nobuaki
Wada Sayuri
Birch & Stewart Kolasch & Birch, LLP
Shameem Golam M
Yamamoto Chemicals Inc.
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