发明名称 |
PROCEDIMENTO PER LA PREPARAZIONE DI COMPOSIZIONI AROMATIZZANTI PER PROFUMI E PER PRODOTTI ALIMENTARI E DI CONSUMO |
摘要 |
A method for producing mixtures containing greater than 50% cis 2-methyl-3-pentenoic acid comprising first reacting methyl acetylene with a methyl magnesium halide to form a methylacetylene magnesium halide Grignard reagent; then reacting the methyl acetylene magnesium halide Grignard reagent with acetaldehyde to form a 3-pentyn-2-ol magnesium halide salt; then hydrolyzing the magnesium halide salt to form 3-pentyn-2-ol; then halogenating the 3-pentyn-2-ol to form a 4-halo-2-pentyne; then reacting magnesium with the 4-halo-2-pentyne to produce a 4-magnesium halo-2-pentyne Grignard reagent; then reacting the 4-magnesium halo-2-pentyne Grignard reagent with carbon dioxide to form a magnesium halo-carboxylate salt mixture of compounds having the structures: CH3O ¦ CH3-C 3BOND C-C-C ANGLE HOMgX and CH3O H¦ CH3-C=C=C-C ANGLE OMgX (wherein X is halogen); then hydrolyzing the magnesium halo-carboxylate salt mixture to form a mixture of carboxylic acids having the structures: CH3O ¦ CH3-C 3BOND C-C-C ANGLE HOH and CH3O ¦ CH3-C=C=C-C ANGLE HOH then hydrogenating the aforementioned mixture of carboxylic acids to form a mixture containing 80% cis-2-methyl-3-pentenoic acid and 20% of 2-methyl-2-pentenoic acid. |
申请公布号 |
IT1050254(B) |
申请公布日期 |
1981.03.10 |
申请号 |
IT19740053650 |
申请日期 |
1974.10.21 |
申请人 |
INTERNATIONAL FLAVORS & FRAGRANCES INC |
发明人 |
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分类号 |
A23L27/20;A24B3/12;A61K8/36;A61Q13/00;C07C17/08;C07C51/00;C07C51/36;C07C57/03;C07C57/18;C07C67/00;C11B9/00;C11D9/44 |
主分类号 |
A23L27/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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