| abstract |
1378094 Production of 2,4-Bis-(hydroxyphenyl)-butanes BAYER AG 30 Jan 1973 [31 Jan 1972] 4591/73 Heading C2C [Also in Division C3] Compounds having the general formula and mixtures thereof, wherein R is H, CN, CH 3 or Cl; and R 1 and R 2 , which may be the same or different, are H, Cl, CH 3 , (CH 3 ) 2 CH, (CH 3 ) 3 C, OH or OCH 3 ; are prepared by reacting at least one phenol of the formula which has at least one free o- or p-position relative to the OH group, with a butadiene of the formula in the presence of an anhydrous acid at 40‹ to 250‹ C. |