中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

36 records (took 0.022 seconds)

    3,5-bis-(Trifluoromethyl)-benzoyl chloride preparation in high yield in 4 stages from readily available 3,5-dimethyl-benzoic acid, for use as intermediate for drugs, pesticides or photoresistant
    12.
    发明专利
    3,5-bis-(Trifluoromethyl)-benzoyl chloride preparation in high yield in 4 stages from readily available 3,5-dimethyl-benzoic acid, for use as intermediate for drugs, pesticides or photoresistant 未知

    公开(公告)号：DE10004717A1

    公开(公告)日：2001-08-09

    申请号：DE10004717

    申请日：2000-02-03

    Applicant: BAYER AG

    Inventor： MARHOLD ALBRECHT ,  STOELTING JOERN

    IPC: C07C51/58 ,  C07B61/00 ,  C07C51/60 ,  C07C51/62 ,  C07C63/00 ,  C07C63/68 ,  C07C63/70

    Abstract: Preparation of 3,5-bis-(trifluoromethyl)-benzoyl chlorides (I) involves converting a 3,5-dimethyl-benzoic acid (V) into the acid chloride (IV), subjecting the side-chains to radical chlorination, fluorinating with anhydrous hydrogen fluoride and/or antimony pentafluoride to give a 3,5-bis-(trifluoromethyl)-benzoyl fluoride and reacting with silicon tetrachloride in presence of another Lewis acid. Preparation of 3,5-bis-(trifluoromethyl)-benzoyl chlorides of formula (I) involves: (1) converting a 3,5-dimethyl-benzoic acid of formula (V) into the corresponding acid chloride of formula (IV); (2) subjecting the side-chains to complete radical chlorination to give a 3,5-bis-(trichloromethyl)-benzoyl chloride of formula (III); (3) fluorinating with anhydrous hydrogen fluoride and/or antimony pentafluoride to give a 3,5-bis-(trifluoromethyl)-benzoyl fluoride of formula (II); and (4) reacting with silicon tetrachloride in presence of another Lewis acid. [Image] X : H, F or Cl. Independent claims are included for the intermediates (III; X = F or Cl) and (IV; X = F or Cl) as new compounds.

    15.
    发明专利
    未知

    公开(公告)号：DE10100591A1

    公开(公告)日：2002-07-11

    申请号：DE10100591

    申请日：2001-01-09

    Applicant: BAYER AG

    Inventor： SEIDEL ANDREAS ,  BAUMANN KAETHE ,  ECKEL THOMAS ,  ZOBEL MICHAEL ,  STOELTING JOERN ,  WITTMANN DIETER

    IPC: C09K21/12 ,  C07F9/12 ,  C08G79/04 ,  C08K5/51 ,  C08K5/523 ,  C08L85/02 ,  C08L101/00 ,  C07F9/08 ,  C08L69/00 ,  C08L55/02 ,  C08J5/10 ,  C09D5/18 ,  C08G79/02

    Abstract: The invention relates to the oligophosphates of the general formula (I), wherein R and R independently represent, individually selectable for every X, hydrogen, halogen, halogen-substituted or halogen-unsubstituted alkyl, alkyl, cycloalkyl, aryl having 1 to 20 carbon atom each, or R and R together with the carbon atom X to which they are bound form the structure of the formula (II) or a cylocalkyl structure substituted or not substituted by halogen, or R or R , on the carbon atom X, also form, together with an R or R on a further carbon atom X', a cyclic structure that is substituted or not substituted by halogen, R to R independently are the same or different and may represent an alkyl having 1 to 10 carbon atoms or halogen, X represents carbon, m is an integer of from 4 to 7, n is an integer of from 1 to 30, y is 0 or 1, and q may independently be the same or different and represent an integer of from 0 to 5. When used in thermoplastic compositions, said oligophosphates have excellent flame-retarding properties, improved thermal stability, a good viscosity level and excellent flowability.

Patent Agency Ranking