Japanese Patent JPS544944

B2

1396623 Sulphones having a 1,5-dimethylhexa-1,5-dienylene group; carotene RHONEPOULENC SA 2 Feb 1973 [2 Feb 1972 10 April 1972] 5368/73 Headings C2C and C2V The invention comprises compounds of the formula wherein the sulphonyl group -SO 2 R replaces a H atom on C atom (a) or (b), R is alkyl, alkenyl, aralkyl, alkaryl or aryl each of which may be substituted by substituents which are electron donors or acceptors, each of A and Q represents (a) a hydrocarbon radical containing 5 n+1 carbon atoms (n being an integer from 1 to 5) which may be substituted; (b) -CH 3 which may be substituted by halogen, -SR1 or -SO 2 R1 wherein R1 is alkyl, aryl, or aralkyl which may be substituted, (c) -CH 2 OH, an ether or ester thereof; (d) a free or protected -CHO group; (e) -COOH or an ester thereof, COCl or CN; with the proviso that Q and A are not both (2,6,6 - trimethylcyclohex - 1 - enyl) - 4 - methylhexa-1,3,5-trienyl, and that the compound of Formula I does not contain any groupings of the formula They may be obtained (1) by reacting a compound of the formula with a compound of the formula wherein one of X and Y is halogen and the other is SO 2 R, in the presence of a basic agent capable of converting the compound in which X or Y is SO 2 R into an anion; (2) when the sulphone group replaces a H atom on C atom (a), by reacting a compound of the formula with a compound of the formula wherein Q1H corresponds to Q, in the presence of an alkaline agent; or (3) when the sulphone group replaces a H atom on C atom (b), by reacting a compound of the formula with a compound of the formula wherein A1H corresponds to A, in the presence of an alkaline agent. Examples are given which illustrate these processes. Compounds containing the grouping or the grouping are obtained by desulphonating a sulphone of Formula I by treatment with a base or by reduction respectively. An example is given in which #-carotene is prepared.

JPS5762251	PREPARATION OF CYSTEAMINE AND/OR CYSTAMINE
JPS62275690	SEPARATION OF L-LEUCINE AND L-ISOLEUCINE

JP1278973A

March 12, 1979

January 31, 1973

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C07C67/00; C09B61/00; C07C313/00; C07C315/04; C07C317/00; C07C317/04; C07C317/08; C07C317/14; C07C317/18; C07C317/24; C07C317/44; C07C401/00; C07C403/00; C07C403/22

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