Process for the preparation of nitrobenzene derivatives
    1.
    发明授权
    Process for the preparation of nitrobenzene derivatives 失效
    硝基苯衍生物的制备方法

    公开(公告)号:US5719317A

    公开(公告)日:1998-02-17

    申请号:US809778

    申请日:1997-03-28

    申请人: Franco Manfre

    发明人: Franco Manfre

    CPC分类号: C07C201/12

    摘要: A method for preparing a compound of formula (I), wherein R.sub.1 and R.sub.2, which are the same or different, are a hydrogen atom or an alkyl or alkoxy radical, or R.sub.1 and R.sub.2, taken together with the carbon atom to which they are attached, form a cycloalkyl radical containing 3-6 carbon atoms. The method comprises dehalogenating a derivative of formula (lI), wherein R.sub.1 and R.sub.2 have the same meanings as in formula (1) and Hal is a chlorine or bromine atom, using 1-2 mol of triethylammonium formate, in the presence of 0.002-0.1 mol of coal-borne palladium per mol of the compound of formula (II), in aceonitrile or tetrahydrofuran and at a temperature between 50.degree. C. and the boiling point of the reaction medium. ##STR1##

    摘要翻译: PCT No.PCT / FR95 / 01241 Sec。 371日期1997年3月28日 102(e)1997年3月28日PCT PCT 1995年9月27日PCT公布。 出版物WO96 / 日期:1996年4月4日制备式(I)化合物的方法,其中R1和R2相同或不同,为氢原子或烷基或烷氧基,或R1和R2与碳一起 它们所连接的原子形成含有3-6个碳原子的环烷基。 该方法包括使式(I)的衍生物脱卤,其中R1和R2具有与式(1)中相同的含义,Hal是氯或溴原子,使用1-2摩尔的三乙基铵甲酸酯,在0.002- 每摩尔式(II)化合物,在乙腈或四氢呋喃中,在50℃和反应介质的沸点之间的温度下,0.1摩尔的煤炭钯。 (I)(II)

    Styrl tetrahydroquinolinium thiol/disulfide dye compound and method for lightening keratin materials using the same
    5.
    发明授权
    Styrl tetrahydroquinolinium thiol/disulfide dye compound and method for lightening keratin materials using the same 有权
    苯乙烯四氢喹啉硫醇/二硫化物染料化合物和使用其来减轻角蛋白材料的方法

    公开(公告)号:US07744657B2

    公开(公告)日:2010-06-29

    申请号:US12234135

    申请日:2008-09-19

    IPC分类号: A61Q5/10 C07C321/00

    摘要: The present disclosure relates to the dyeing of keratin materials using thiol/disulfide styryl tetrahydroquinolinium fluorescent dyes. Disclosed herein is a dye composition comprising a thiol/disulfide styryl tetrahydroquinolinium fluorescent dye and a dyeing process with, for instance, a lightening effect on keratin materials such as hair, using said composition. Disclosed herein are thiol fluorescent dyes and the uses thereof in lightening keratin materials. This composition can be used to obtain a lightening effect which can be resistant and visible on dark keratin fibers.

    摘要翻译: 本公开涉及使用硫醇/二硫化苯乙烯基四氢喹啉鎓荧光染料染色角蛋白材料。 本文公开了包含硫醇/二硫化苯乙烯基四氢喹啉鎓荧光染料和染色方法的染料组合物,其使用所述组合物具有例如对角蛋白材料如头发的减轻作用。 本文公开了硫醇荧光染料及其在减轻角蛋白材料中的用途。 该组合物可用于获得可在黑色角蛋白纤维上耐受和可见的减轻效果。

    Diastereoselective method of preparing olefins by means of the horner-wadsworthemmons reaction, comprising the addition of a tris-(polyoxaalkyl)-amine sequestering agent
    6.
    发明申请
    Diastereoselective method of preparing olefins by means of the horner-wadsworthemmons reaction, comprising the addition of a tris-(polyoxaalkyl)-amine sequestering agent 审中-公开
    通过天然气流动反应制备烯烃的非对映选择性方法,包括加入三 - (聚氧杂烷基) - 胺螯合剂

    公开(公告)号:US20060100456A1

    公开(公告)日:2006-05-11

    申请号:US10528715

    申请日:2003-09-22

    摘要: The invention relates to a process for the diastereoselective preparation of olefins via the Homer-Wadsworth-Emmons reaction, which consists in reacting at low temperature a phosphonate with a carbonyl derivative in the presence of a base in a suitable solvent, characterized in that a tris(polyoxaalkyl)amine sequestering reagent of formula (I): N—[CHR1—CHR2—O—(CHR3—CHR4—O)n—R5]3 (I), wherein: n is an integer between 0 and 10; R1, R2, R3 and R4 may be identical or different, and represent a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms; R5 represents a hydrogen atom, an alkyl or cycloalkyl radical containing up to 12 carbon atoms, a phenyl radical or a radical of formula —CμH2μ-Φ, or CmH2m+1-Φ-, with m being an integer between 1 and 12 and Φ being a phenyl radical; is added in an amount that is sufficient to increase the diastereoselectivity of the olefin.

    摘要翻译: 本发明涉及通过Homer-Wadsworth-Emmons反应非对映选择性制备烯烃的方法,该方法在低温下使膦酸酯与羰基衍生物在碱的存在下在合适的溶剂中反应,其特征在于三 (I)的(多氧烷基)胺螯合试剂:N- [CHR 1 -CH 2,-SO 2 -O-(CHR 3 - (I)其中:n是介于0和...之间的整数,其中,n是0和...之间的整数。 10; R 1,R 2,R 3和R 4可以相同或不同,并且表示氢原子 或含有1至4个碳原子的烷基; R 5表示氢原子,含有至多12个碳原子的烷基或环烷基,苯基或式-CmuH 2 mu-Phi的基团或C m H 2m + 1 -hi-,m是1和12之间的整数,Phi是苯基; 以足以增加烯烃的非对映选择性的量加入。