Esters of .alpha.-hydroperoxy-bis-p-halo-phenylacetic acids
申请人:Yeda Research & Development Co., Ltd.
公开号:US04066785A1
公开(公告)日:1978-01-03
New esters of the .alpha.-hydroperoxy-bis-p-chloro-(or-bromo)-phenylacetic acids useful as acaricides, process for the preparation of same and compositions containing such materials.
talyzed C−C bond functionalization of arylallyl alcohols using donor‐acceptor carbenes is presented. The allylic hydroxyl group is found to assist the product formation by neighboring group participation providing a clue towards mechanistic understanding. This method can also be employed to effect homologation of allylalcohols to homoallyl alcohols. Overall, this metal‐free transformation presents
functionalizations of more distal C-H bonds in hydrocinnamoyl ketones, Weinreb amides, and biphenyl Weinreb amides. Mechanistically, the coordination of these carbonyl groups and the bisdentate amino acid ligand with Pd(II) centers provides further evidence for our early hypothesis that the carbonyl groups of the potassium carboxylate are responsible for the directed C-H activation of carboxylicacids.
Enantioselective N–H Bond Insertion Reaction of Anilines Enabled by Ruthenium and Chiral Phosphoric Acid Cooperative Catalysis
作者:Shaoran An、Yan Zhu、Jiangtao Sun
DOI:10.1021/acs.orglett.4c02135
日期:2024.7.26
The enantioselective carbene insertion into N–H bonds of anilines has been realized by cooperativecatalysis of ruthenium complexes and chiralphosphoricacids, providing the expected α-aryl glycines in moderate to good yields with high enantioselectivity. Typically, by slightly modifying the reaction conditions, this approach allows the N–H bond insertion reaction to be effective for both α-aryl and