申请人:Argus Chemical Corp.
公开号:US04250312A1
公开(公告)日:1981-02-10
A 2,2,6,6-tetramethyl-4-piperidone spiroketal carbinol compound of Formula I ##STR1## in which R.sub.1 represents an alkyl group having from one to six carbon atoms, is prepared by heating a trimethylolalkane compound having the formula R.sub.1 --C(CH.sub.2 OH).sub.3 with a 2,2,6,6-tetramethyl-4-piperidone ketal compound of Formula II ##STR2## in which R.sub.2 represents an alkyl group having from one to twelve carbon atoms or an ether-interrupted alkyl group having from three to twelve carbon atoms and from one to two ether oxygen atoms, removing alcohol R.sub.2 OH, and recovering 2,2,6,6-tetramethyl-4-piperidone spiroketal carbinol compound of Formula I.
公式I中的2,2,6,6-四甲基-4-哌啶酮螺内酯羟基化合物,其中R1代表具有1至6个碳原子的烷基基团,通过将具有公式R1-C(CH2OH)3的三甲基羧酸醇化合物与公式II中的2,2,6,6-四甲基-4-哌啶酮螺内酯基化合物加热,其中R2代表具有1至12个碳原子或3至12个碳原子和1至2个醚氧原子的醚中断烷基基团,去除醇R2OH,并回收公式I中的2,2,6,6-四甲基-4-哌啶酮螺内酯羟基化合物。