A xanthene derivative, a production process of the same and a composite for giving an image which includes the same.

摘要

@ This invention relates to a xanthene derivative that develops colour on oxidation, so that it is favorably used for a photoresist, a PS plate or a proofing agent. The xanthene derivative, which has the following structural formula (I), is produced by putting a fluoran derivative represented by the following structural formula (II) to an esterification reaction and then to a reduction reaction.
<Chemistry id="chema01" num="0001"><Image id="ia01" he="41" wi="54" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>and
<Chemistry id="chema02" num="0002"><Image id="ia02" he="35" wi="59" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>In the above formulae R<Sub>1</Sub> and R<Sub>2</Sub> independently stand for hydrogen, an alkyl radical with 1 to 8 carbon atoms, a tetrahydrofurfuryl radical, a substituted or an unsubstituted phenyl radical, a substituted or an unsubstituted benzyl radical or a cyclic alkyl radical; in addition, R<Sub>1</Sub> and R<Sub>2</Sub> are able to form a ring in pairs. R<Sub>3</Sub> and R<Sub>6</Sub> independently stand for hydrogen, chlorine, fluorine, a lower alkyl radical or a lower alkoxy radical. R<Sub>4</Sub> and R<Sub>5</Sub> independently stand for hydrogen. chlorine, fluorine, a lower alkyl radical, a lower alkoxy radical, a lower alkoxyalkyl radical, a substituted or an unsubstituted phenyl radical, a substituted or an unsubstituted benzyl radical, an amino radical, a N-substituted or

N,N-substituted amino radical or a cyclic alkyl radical; in addition, R<Sub>3</Sub> and R<Sub>4</Sub>, R<Sub>4</Sub> and R<Sub>6</Sub>, and R<Sub>5</Sub> and R<Sub>6</Sub> are able to form a ring in pairs respectively. R<Sub>7</Sub> stands for an alkyl radical, a substituted or an unsubstituted phenyl radical or a substituted or an unsubstituted benzyl radical. X stands for hydrogen, chlorine, fluorine, bromine, a nitro radical, a lower alkyl radical or a lower alkylamino radical; and n stands for an integer from 1 to 4 inclusive.