NEW MATERIAL:A compound shown by the formulaI(R1 and R2 are H, lower alkyl, or lower alkenyl; R3 and R4 are lower alkyl or lower alkenyl). EXAMPLE:1,4-Dimethyl-2,5-dithia-7-oxa-bicyclo[2,2,1]heptane. USE:An imparter for providing prolonged flavor and fragrance or modifier. Useful for foods and drinks, cosmetics, healthy or hygienic products, drugs, etc. PROCESS:For example, a 1,4-dialkyl or 1,3,4,6-tetralkyl-1,4-dihydroxy-2,5-dithian shown by the formula II is dehydrated optionally in the coexistence of an organic solvent in the presence of an acid catalyst.
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机译：新材料：由式I表示的化合物（R 1和R 2为H，低级烷基或低级烯基; R 3和R 4为低级烷基或低级烯基）。实施例：1，4-二甲基-2，5-二硫杂-7-氧杂双环[2，2，1]庚烷。用途：提供延长的味道和香气或改良剂的传授者。适用于食品和饮料，化妆品，健康或卫生产品，药物等。工艺：例如1,4-二烷基或1,3,4,6-四烷基-1,4-二羟基-2,5-二巯基在酸催化剂存在下，任选在有机溶剂共存下将式II所示的式（I）所示的化合物脱水。
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