METHODS Cilnidipine was synthesized from cinnamyl alcohol by esterification, feminization and condensation - cyclization.
方法以肉桂醇为原料，经酯化、氨化和缩合-环合而得。
2
Bromacil was synthesized using 2-bromobutane and urea as the starting materials in three steps including condensation, cyclization and bromination with total yield of 61%.
以2 -溴丁烷和尿素作为起始原料，经缩合、环化、溴代三步反应得到除草定，总收率为61%。
3
By adjusting the reaction temperature or using different cyclization methods, condensation is carried out, and indanone dimmer and indanone trimer can be obtained respectively.