Document Type and Number:
Japanese Patent JPS5231863
Kind Code:
B1
Abstract:
1340211 #-Ionones BADISCHE ANILIN- & SODA-FABRIK AG 12 May 1971 [13 May 1970 10 April 1971] 14378/71 Heading C2C #-Ionones of formula in which R1 , R2 and R3 are hydrogen or methyl are prepared by oyclizing a pseudo-ionone of formula in which X is or and Y is -C(CH 3 ) = CH- with sulphuric acid at a temperature of from -30 to +20 C. in the presence of a mixture of an optionally chlorinated liquid hydrocarbon boiling at a temperature below 200 C. at atmospheric pressure and a C 1 -C 6 alkanol, the molar ratio of pseudoionone to alcohol being from 1 : 0À05 to 1 : 5 and that of pseudoionone to alcohol being from 1 : 5 to 1 : 15 and the sulphuric acid used having a stength of from 90 to 98%.
Application Number:
JP3165271A
Publication Date:
August 17, 1977
Filing Date:
May 13, 1971
Export Citation:
International Classes:
C07C45/00; C07C403/00; C07C; (IPC1-7): C07C49/61; C07C45/00