Oxygen-containing aliphatic compounds and their use as intermediates for
the preparation of 4-hydroxy-2, 5-dimethyl-3(2H)-furanone
    1.
    发明授权
    Oxygen-containing aliphatic compounds and their use as intermediates for the preparation of 4-hydroxy-2, 5-dimethyl-3(2H)-furanone 失效
    含氧脂肪族化合物及其作为制备4-羟基-2,5-二甲基-3(2H) - 呋喃酮的中间体的用途

    公开(公告)号:US5580996A

    公开(公告)日:1996-12-03

    申请号:US416809

    申请日:1995-04-13

    摘要: The compounds of the invention are characterised by the formulae ##STR1## wherein index p represents an integer equal to 2 or 3 and q can take the value zero or 1, with the provision that p+q=3. Said compounds are obtained from hex-3-yne-2,5-diol following a process which comprises reacting an ethylenic compound of formula(CH.sub.3).sub.2 C.dbd.C(H).sub.n (CH.sub.3).sub.m (I)wherein index n represents an integer equal to 1 or 2 and m can take the values zero or 1 and wherein n+m=2, with hex-3-yne-2,5-diol, followed by the oxidation of the acetylenic ether obtained by means of ruthenium tetroxide. The compounds of formula (III) can be used as intermediate products for the preparation of 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol.RTM.).

    摘要翻译: PCT No.PCT / IB94 / 00261 Sec。 371日期1995年04月13日 102(e)日期1995年4月13日PCT 1994年9月1日PCT PCT。 公开号WO95 / 07876 日期1995年3月23日本发明化合物的特征在于其中指数p表示等于2或3的整数,q可以取0或1的值与式 p + q = 3的规定。 所述化合物是通过使式(CH 3)2 C = C(H)n(CH 3)m(I)的烯属化合物反应的方法从己-3-炔-2,5-二醇获得,其中指数n表示整数 等于1或2,m可以取值为零或1,并且其中n + m = 2,与己-3-炔-2,5-二醇,然后氧化通过四氧化钌获得的炔属醚。 式(III)化合物可用作制备4-羟基-2,5-二甲基-3(2H) - 呋喃酮(Furaneol TM)的中间产物。

    Naphthalenic compound and process for its preparation
    3.
    发明授权
    Naphthalenic compound and process for its preparation 失效
    萘化合物及其制备方法

    公开(公告)号:US5476977A

    公开(公告)日:1995-12-19

    申请号:US286732

    申请日:1994-08-05

    摘要: 1,1,2,3,4,4,6-Heptamethyl-1,2,3,4-tetrahydronaphthalene, a novel naphthalenic compound, is useful as an intermediate for the preparation of 5,6,7,8-tetrahydro-3,5,5,6,7,8,8-heptamethyl-2-naphthalenecarbaldehyde. It is prepared by a process consisting of the addition of an olefin of formula ##STR1## wherein R.sup.1 and R.sup.2 represent different substituents and each defines a hydrogen atom or a methyl radical, with p-cymene. 4,4-Dimethyl-2-pentene [compound (III): R.sup.1 =CH.sub.3 ; R.sup.2 =H] is obtained by the co-metathesis reaction of an olefin of formula ##STR2## wherein R.sup.1 and R.sup.2 represent identical substituents designating each a hydrogen atom or a methyl radical, with an olefin of formula ##STR3## wherein R.sup.3 and R.sup.4 identical or different, designate each a hydrogen atom or a methyl radical in the presence of an appropriate catalyst consisting of Re.sub.2 O.sub.7 on an inert solid carrier, or of WCl.sub.6 /(C.sub.2 H.sub.5))/Bu.sub.4 Sn.

    摘要翻译: 1,1,2,3,4,4,6-七甲基-1,2,3,4-四氢萘,一种新型的萘化合物,可用作制备5,6,7,8-四氢 - 3,5,5,6,7,8,8-七甲基-2-萘甲醛。 其通过加入式(III)的烯烃(其中R 1和R 2表示不同取代基并且各自定义氢原子或甲基)与对甲基异丙苯组成的方法制备。 4,4-二甲基-2-戊烯[化合物(III)):R1 = CH3; R2 = H]是通过将每个氢原子或甲基自由基的式Ⅸ取代基的烯烃与式Ⅵ的烯烃进行共同换位反应而获得的,每一个表示氢原子或甲基,在 在惰性固体载体或WCl 6 /(C 2 H 5))/ Bu 4 Sn上由Re 2 O 7组成的合适的催化剂。

    Process for the preparation of 4,4-dimethyl-2-pentene
    4.
    发明授权
    Process for the preparation of 4,4-dimethyl-2-pentene 失效
    制备4,4-二甲基-2-戊烯的方法

    公开(公告)号:US5396014A

    公开(公告)日:1995-03-07

    申请号:US39014

    申请日:1993-03-29

    摘要: 1,1,2,3,4,4,6-Heptamethyl-1,2,3,4-tetrahydronaphthalene, a novel naphthalenic compound, is useful as an intermediate for the preparation of 5,6,7,8-tetrahydro-3,5,5,6,7,8,8-heptamethyl-2-naphthalenecarbaldehyde. It is prepared by a process consisting in the addition of an olefin of formula ##STR1## wherein R.sup.1 and R.sup.2 represent different substituents and each defines a hydrogen atom or a methyl radical, with p-cymene. 4,4-Dimethyl-2-pentene [compound (III): R.sup.1 =CH.sub.3 ; R.sup.2 =H] is obtained by the co-metathesis reaction of an olefin of formula ##STR2## wherein R.sup.1 and R.sup.2 represent identical substituents designating each a hydrogen atom or a methyl radical, with an olefin of formula ##STR3## wherein R.sup.3 and R.sup.4, identical or different, designate each a hydrogen atom or a methyl radical in the presence of an appropriate catalyst consisting of Re.sub.2 O.sub.7 on an inert solid carrier, or of WCl.sub.6 /(C.sub.2 H.sub.5).sub.2 O/Bu.sub.4 Sn.

    摘要翻译: PCT No.PCT / CH92 / 00128 Sec。 371日期1995年3月29日 102(e)1995年3月29日PCT PCT。1992年6月29日PCT公布。 出版物WO93 / 04023 日期1993年3月4日.1,1,2,3,4,4,6-七甲基-1,2,3,4-四氢萘(一种新型的萘化合物)可用作制备5,6,7 ,8-四氢-3,5,5,6,7,8,8-七甲基-2-萘甲醛。 它通过一种方法制备,该方法包括加入式取代基的烯烃,并且各自定义氢原子或甲基与对甲基异丙基苯。 4,4-二甲基-2-戊烯[化合物(III)):R1 = CH3; R2 = H]是通过式(I)的烯烃与式(Ⅰ)的烯烃(II)的共转换反应得到的,其中R 1和R 2表示与氢原子或甲基基团相同的取代基, )其中R 3和R 4相同或不同,在惰性固体载体或WCl 6 /(C 2 H 5)2 O / Bu 4 Sn上由Re 2 O 7组成的合适催化剂存在下,各自表示氢原子或甲基。