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류성곤(Sung Kon Ryu),정근회(Kun Hoe Chung),고영관(Young Kwan Ko),장해성(Hae Sung Chang),류재욱(Jae Wook Ryu),우재춘(Jae Chun Woo),구동완(Dong Wan Koo),김대황(Dae-Whang Kim) 한국농약과학회 2004 농약과학회지 Vol.8 No.1
Fenoxaprop-p-ethyl[Ethyl (R)-2-{4-(6-chloro-1,3-benzoxazol- 2-yloxy)phenoxy}propionate] is well known as a herbicide for its specific activity against the weed grasses. This compound was synthesized by the reaction of 4-(6-chloro-1,3-benzoxazol-2-yloxy)phenol and ethyl (S)-O-(p-toluenesulfonyl)lactate in good yields with high optical pure (optical purity : 99.9% up). In this process Walden inversion occurs, whereby the S-configuration of the propionic acid derivative is converted to the R-configuration of the final product. 4-(6-Chloro-1,3-benzoxazol-2-yloxy)phenol was obtained by 5 step reactions in over-all 70% yields using inexpensive raw materials.