1-ethyl-33-d methyl cyclohexane derivs useful in - perfumery having flower like and woody odours

摘要

New cpds. of formula (I): (where X is H; Y is OR, R being H, acetyl, propionyl or acetoacetyl; or X and Y together form O), e.g. 1-(3:3-dimethyl-1-cyclohexyl)-ethyl propionate, 1-(3:3-dimethyl-1-cyclohexyl)-ethanol. The prepn. of these cpds. depends on the nature of Grps. X, Y and R; thus where X is H and Y is OR, R being acetyl or propionyl, the prepn. comprises reacting 2:6-dimethyl-2:7-octadiene with acetic acid or propionic acid in the presence of a Lewis acid catalyst, e.g. BF3-etherate, at 55-60 degrees C.