Sulphones having a 1,5-dimethyl-hexa-1,5-dienylene group
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United States of America Patent
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Feb 21, 1984
Issued Date -
N/A
app pub date -
Feb 4, 1982
filing date -
Feb 2, 1972
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Sulphones useful for preparing polyenes have the formula: ##STR1## where the sulphonyl group replaces a hydrogen atom on carbon atom (a) or (b), R represents alkyl, aralkyl or aryl, optionally substituted, A and Q represent an optionally substituted hydrocarbon of 5n+1 carbon atoms (n is 1-5), methyl, optionally substituted by halogen, sulphide or sulphone, CH.sub.2 OH (or an ether or ester thereof), CHO (optionally protected), COOH (or an acid chloride, ester or nitrile thereof), with the proviso that when A represents a 2-(2,6,6-trimethylcyclohex-1-enyl) ethenyl radical, Q cannot represent --COOH or an ester thereof.
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