发明申请
US20040245503A1 Photoluminescent compounds 失效
光致发光化合物

  • 专利标题: Photoluminescent compounds
  • 专利标题(中): 光致发光化合物
  • 申请号: US10486965
    申请日: 2004-02-17
  • 公开(公告)号: US20040245503A1
    公开(公告)日: 2004-12-09
  • 发明人: Ian C SageWendy H HowieIan D Brotherston
  • 优先权: GB0119727.6 20010814
  • 主分类号: C09K011/06
  • IPC分类号: C09K011/06 B32B009/00
Photoluminescent compounds
摘要:
A method of making a 3-alkylcycloalkanol of formula 2: where RI represents a methyl or ethyl group, R2 represents hydrogen, R3 represents an ethyl, propyl, butyl, isobutyl or isoamyl group, R4 represents hydrogen and R5 represents hydrogen, or a methyl, ethyl, propyl, isobutyl or isoamyl group comprises the following steps: (1) carrying out an electrophilic substitution reaction of an alkyl group or precursor thereof, on an ortho-substituted alkylbenzene compound of formula 3: where R6 represents hydrogen, or a methyl or ethyl group; (2) hydrogenating the reaction product of step (1); (3) performing an elimination reaction on one or more reaction products of step (2) to produce one or more alkene products; and (4) hydrating the one or more alkene products of step (3) to provide a 3-alkylcycloalkanol of formula 2. The electrophilic substitution reaction of step (1) may be a Friedel-Crafts acylation, e.g. using an isopropyl ketone precursor, or a Friedel-Crafts alkylation, e.g. using an isobutyl group. The 3-alkylcycloalkanols, especially 3-(2-methylpropyl)-1-methylcyclohexanol, are useful fragrance materials and find use in perfumes and perfumed products.
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