| 摘要 |
<p>A photographic element comprises a light sensitive silver halide emulsion layer having associated therewith an open chain α-carbonyl acetanilide yellow dye-forming coupler having the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="35" wi="110" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> wherein
<UnorderedLists id="ula01" listStyle="none" compact="compact"><ListItem>R<Sub>1</Sub> is selected from the group consisting of alkyl, aryl, heterocyclic, and amino groups, provided that R<Sub>1</Sub> may form a ring bonded to another carbon atom which is a member of Ring "A";</ListItem><ListItem>each R<Sub>2</Sub> is independently selected from the group consisting of those substituents having a Hammett's sigma value of 0 or less, and m is from 0 to 4;</ListItem><ListItem>each R<Sub>3</Sub> and R<Sub>4</Sub> for each of the n carbon atoms is independently selected from the group consisting of hydrogen, alkoxy, aryl, heterocyclic, aryloxy, and alkyl groups, and n is 0 to 16;</ListItem><ListItem>each R<Sub>5</Sub> independently selected from the group consisting of amino, alkyl groups, and groups linked to the "B" ring by oxygen or sulfur, and p is 1 to 3, provided that two R<Sub>5</Sub> groups may join to form a ring;</ListItem><ListItem>R<Sub>6</Sub> is selected from the group consisting of alkyl, aryl, and amino groups;</ListItem><ListItem>each L is independently a divalent linking group and q is 0 to 3; and</ListItem><ListItem>Ring "A" is bonded indirectly to the 3-, 4-, or 5-position of Ring "B"; and</ListItem><ListItem>Z is hydrogen, or a group capable of coupling-off when the coupler reacts with an oxidized color developing agent.</ListItem></UnorderedLists></p> |
