Patent ID: 9695136
Date: 2017-07-04
CPC Classifications: C07D

Claim:
1. A process for preparing heonone (meth)acrylate by transesterification of alkyl (meth)acrylate with heonone, which comprises the steps: (i) reaction of alkyl (meth)acrylate with heonone in the presence of a catalyst comprising titanium(IV) or zirconium(IV) and a stabilizer in the presence of an entrainer which forms an azeotrope with the alcohol produced from the alkyl (meth)acrylate, (ii) continuous removal by distillation of the azeotrope of entrainer and alcohol, with steps (i) and (ii) being carried out simultaneously until heonone has essentially completely reacted, (iii) addition of water to the product mixture comprising heonone (meth)acrylate obtained in steps (i) and (ii) and removal of the hydrolyzate of the catalyst comprising titanium(IV) or zirconium(IV) by filtration, (iv) distillation of unreacted alkyl (meth)acrylate and entrainer from the product mixture, and (v) distillation of water from the product mixture, with step (iv) also being able to be carried out before step (iii) and steps (iv) and (v) also being able to be carried out in a distillation step, wherein steps (i) and (ii) are carried out in the presence of an inorganic or organic acid.