Dynamic kinetic resolution of racemic tropic acid ethyl ester and its derivatives
作者:Mary Rose Atuu、M. Mahmun Hossain
DOI:10.1016/j.tetlet.2007.03.143
日期:2007.5
The dynamic kinetic resolution of racemic mixtures of tropic acid ethyl ester under substrate racemizing conditions was studied using lipase PS with a ruthenium catalyst. Isopropenyl acetate was used as an acyl donor, since it was found to be compatible with both catalysts; this resulted in an efficient dynamic kinetic resolution. With this process, a variety of racemic tropic acid ethyl esters were
The present invention relates to the use of compounds of the formula (I), with radicals defined in the description, as antioxidants, to corresponding novel compounds and compositions, and to corresponding processes for the preparation of compounds and compositions.
The present invention relates to the use of compounds which do not themselves exhibit significant UV absorption in the UV-A or UV-B region, but are reactive under use conditions, for the development of UV-A or UV-B protection during use, to corresponding novel compounds and compositions, and to corresponding processes for the preparation of compounds and compositions.