Polymethine ether compounds
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United States of America Patent
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May 4, 2010
Grant Date -
Jan 8, 2009
app pub date -
Jun 20, 2008
filing date -
Jun 25, 2003
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Expired
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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.represents 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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