Methyl-pentenyl sulphones
    7.
    发明授权
    Methyl-pentenyl sulphones 失效
    甲基戊烯基砜

    公开(公告)号:US3980695A

    公开(公告)日:1976-09-14

    申请号:US351342

    申请日:1973-04-16

    CPC分类号: C07C317/22 C07C317/44

    摘要: Sulphones of formula QSO.sub.2 CH.sub.2 CY=CY.sub.1 CH.sub.2 CHRR.sub.1 wherein one of Y and Y.sub.1 is hydrogen the other methyl, R and R.sub.1 are CHO, COR.sub.2, COOH, COOR.sub.3, CONR.sub.5 R.sub.5, CN, SO.sub.2 R.sub.4, SO.sub.3 R.sub.5 and NO.sub.2, wherein R.sub.2 -R.sub.5 are alkyl or aryl and R.sub.5 can be hydrogen, and Q is alkyl, substituted alkyl, aryl, aralkyl or alkaryl or optionally substituted, optionally unsaturated terpene of 5n carbon atoms (n being 1-9), but excluding 2- or 3-methylbutadienyl and 2-butadienylmethyl, are intermediates for preparing terpenes.

    摘要翻译: 式QSO2CH2CY = CY1CH2CHRR1的砜,其中Y和Y1之一是氢,另一个甲基,R和R1是CHO,COR2,COOH,COOR3,CONR5R5,CN,SO2R4,SO3R5和NO2,其中R2-R5是烷基或芳基,R5 可以是氢,Q是烷基,取代的烷基,芳基,芳烷基或烷芳基或任选取代的5n个碳原子的不饱和萜烯(n为1-9),但不包括2-或3-甲基丁二烯基和2-丁二烯基甲基 制备萜烯的中间体

    Process for the preparation of citral
    9.
    发明授权
    Process for the preparation of citral 失效
    制定CITRAL的过程

    公开(公告)号:US5177265A

    公开(公告)日:1993-01-05

    申请号:US743358

    申请日:1991-10-31

    CPC分类号: C07C45/515 C07C45/71

    摘要: An improved method for preparing citral in liquid phase from prenol and prenal, wherein, in a single reaction enclosure, the prenol and prenal are condensed in the presence of a mineral acid at a concentration of about 5.10.sup.-3 mole for one mole of prenal, 90 to 95% of the acid is neutralized, and once excess prenal and prenol is eliminated, the citral is distilled.

    摘要翻译: PCT No.PCT / FR90 / 00958 Sec。 371日期1991年10月31日 102(e)1991年10月31日PCT PCT 1990年12月28日PCT公布。 公开号WO91 / 09830 日期:1991年7月11日。一种用于从前醇和前体制备液相中柠檬醛的改进方法,其中在单一反应封闭物中,在无机酸存在下浓缩前醇和前体,浓度为约5.10-3 摩尔为1摩尔的prenal,90%至95%的酸被中和,一旦过量的prenal和prenol被消除,柠檬醛被蒸馏。