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    • 34. 发明申请
    • PROCESS FOR PREPARING M- OR P-SUBSTITUTED PHENYLALKANOLS BY ALKYLATION
    • 通过烷基化制备M取代或P-取代的苯基甘露醇的方法
    • US20120209030A1
    • 2012-08-16
    • US13503515
    • 2010-10-14
    • Andreas LanverKlaus EbelKarl BeckRalf PelzerJörg BotzemUlrich Griesbach
    • Andreas LanverKlaus EbelKarl BeckRalf PelzerJörg BotzemUlrich Griesbach
    • C07C45/29C07C29/32
    • C07C29/32C07C29/56C07C45/29C07C33/20C07C47/228
    • The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) in which R1 is bonded to the phenyl ring in the m- or p-position and is C1-C5-alkyl, and R2, R3, R4 and R5, independently of one another, are hydrogen or methyl, wherein an unsubstituted phenylalkanol of the formula (II) in which R2, R3, R4 and R5 have the meanings given under formula (I) is alkylated together with a C1-C5-alkyl halide of the formula (III) R1-Hal  (III), in which R1 has the meaning given under formula (I) and Hal is halogen, in the presence of a Friedel-Crafts catalyst to give an m- or p-alkyl-substituted phenylalkanol of the formula (I), then the reaction mixture is worked-up and the desired m- or p-alkyl-substituted phenylalkanol of the formula (I) is separated off, the other formed by-products are returned to the reaction mixture and these are isomerized in the presence of a Friedel-Crafts catalyst to give the desired m- or p-alkyl-substituted phenylalkanol. From the m- or p-alkyl-substituted phenylalkanols of the formula (I), it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which play an interesting role as fragrances and aroma chemicals.
    • 本发明涉及一种制备式(I)的间 - 或对 - 取代的苯烷醇的方法,其中R 1与m-或p-位上的苯环键合并且是C1-C5-烷基,R2 R 3,R 4和R 5彼此独立地为氢或甲基,其中R 2,R 3,R 4和R 5具有式(I)所示含义的式(II)的未取代的苯基烷醇与 其中R 1具有式(I)所示含义,Hal为卤素的式(III)R1-Hal(Ⅲ)的C1-C5烷基卤化物,在Friedel-Crafts催化剂存在下,得到m- 或式(I)的对烷基取代的苯基链烷醇,然后将反应混合物处理并分离所需的式(I)的间 - 或对 - 烷基取代的苯基烷醇,另一个形成的副产物 返回到反应混合物中,并将它们在Friedel-Crafts催化剂存在下异构化,得到所需的间 - 或对 - 烷基取代的苯基 kanol 从式(I)的间 - 或对 - 烷基取代的苯烷醇,可以通过氧化或脱氢形成作为有价值的产物,相应的醛作为香料和香气化学品起着重要的作用。
    • 38. 发明申请
    • RECOVERY OF BIS(DIARYLPHENOL) LIGANDS DURING THE PRODUCTION OF ISOPULEGOL
    • 在ISOPULEGOL生产过程中恢复BIS(DIARYLPHENOL)配体
    • US20100010253A1
    • 2010-01-14
    • US12439270
    • 2007-08-31
    • Gunnar HeydrichGabriele GrallaKlaus Ebel
    • Gunnar HeydrichGabriele GrallaKlaus Ebel
    • C07C29/14C07C29/17C07C37/68C07C45/78C07C67/48
    • C07C29/56B01J31/0214B01J31/143B01J31/4015B01J2531/31C07B2200/07C07C29/172C07C29/80C07C2601/14Y02P20/584C07C35/12C07C35/17
    • The present invention relates to a method of working up an aluminium-containing reaction product from the production of isopulegol by cyclization of citronellal in the presence of complex compounds, comprising at least one ligand of the formula (I), where Ar1, Ar2, Ar3, Ar4 are chosen from C6-C15-aryl or C2-C15-hetero; R1, R2, R3, R4 are chosen from H, C1-C6-alkyl, C1-C6-perfluoroalkyl, C1-C6-alkoxy, C7-C12-aralkyl, halogen, SiR5bR6bR7b, C6-C10-aryl, NR8bR9b, SR10b, NO2; and where R1 or R2 and/or R3 or R4, together with A, can form an aromatic or nonaromatic cycle; etc.; in which a) the aluminum-containing reaction product is subjected to distillative separation, b) the isopulegol-depleted bottom product is brought into close contact with an aqueous base and c) the ligand of the formula (I) is separated off from the organic phase, preferably by crystallization. Moreover, the invention relates to a method of producing isopulegol, and to a method of producing menthol.
    • 本发明涉及一种通过在络合物存在下使香茅醛环化制备异胡醇的方法,所述复合化合物包含至少一种式(I)的配位体,其中Ar 1,Ar 2,Ar 3 ,Ar 4选自C 6 -C 15 - 芳基或C 2 -C 15 - 杂原子; R1,R2,R3,R4选自H,C1-C6-烷基,C1-C6-全氟烷基,C1-C6-烷氧基,C7-C12-芳烷基,卤素,SiR5bR6bR7b,C6-C10-芳基,NR8bR9b,SR10b, NO2; 并且其中R 1或R 2和/或R 3或R 4与A一起可以形成芳族或非芳族化合物; 等等。; 其中a)使含铝反应产物进行蒸馏分离,b)将异底三醇消耗的底部产物与碱水溶液紧密接触,并且c)将式(I)的配体与有机物分离出来 相,优选通过结晶。 此外,本发明涉及一种生产异胡母醇的方法和一种制备薄荷醇的方法。