Asymmetric Reduction of Oxime Ethers Promoted by Chiral Spiroborate Esters with an O3BN Framework
摘要:
Enatioselective reduction of oxime ethers promoted by chiral spiroborate esters with an O3BN framework is reported for the first time. In the presence of (R,S)-1, 11 aralkyloxime ethers are reduced by borane-THF at 0-5 degrees C to give (S)-1-aralkylamine in high yield and excellent enatiomeric excess (up to 98% ee). Influence of reaction conditions on the enantioselectivity of the reduction is investigated, and a possible mechanism of the catalytic reduction is suggested.
Asymmetric Reduction of Oxime Ethers Promoted by Chiral Spiroborate Esters with an O<sub>3</sub>BN Framework
作者:Yunbo Chu、Zixing Shan、Dejun Liu、Nannan Sun
DOI:10.1021/jo060123n
日期:2006.5.1
Enatioselective reduction of oxime ethers promoted by chiral spiroborate esters with an O3BN framework is reported for the first time. In the presence of (R,S)-1, 11 aralkyloxime ethers are reduced by borane-THF at 0-5 degrees C to give (S)-1-aralkylamine in high yield and excellent enatiomeric excess (up to 98% ee). Influence of reaction conditions on the enantioselectivity of the reduction is investigated, and a possible mechanism of the catalytic reduction is suggested.
Synthesis, larvicidal activity, and SAR studies of new benzoylphenylureas containing oxime ether and oxime ester group
作者:Ranfeng Sun、Yongqiang Li、Maoyun Lü、Lixia Xiong、Qingmin Wang
DOI:10.1016/j.bmcl.2010.04.144
日期:2010.8
A series of new structural benzoylphenylureas (BPUs) containing oxime ether and oximeestergroup were designed and synthesized. The larvicidal activities against Oriental armyworm and mosquito of these benzoylphenylureas were evaluated and the result of bioassay displayed specific structure–activity relationship (SAR). Most of the compounds exhibited excellent larvicidal activities against Oriental