dual-metal-catalyzed asymmetric allylic alkylationreaction has been developed by makig use of challenging trisubstituted allylic esters and nucleophilic C3-substituted oxindole derivatives. A variety of allylated products bearing vicinal all-carbon quaternarystereocenters could be obtained in good yields with high to excellent diastereoselectivities (up to 20 : 1 dr) and enantioselectivities (up to 99 % ee)
Anionic Amino-Cope Rearrangement Cascade Synthesis of 2,4-Substituted Benzoate Esters from Acyclic Building Blocks
作者:M. Haziq Qureshi、Jon T. Njardarson
DOI:10.1021/acs.orglett.2c03134
日期:2022.11.4
We report a new anionic cascade for assembling 2,4-substituted benzoate esters in one pot from racemic β-fluoro-substituted conjugated tert-butylsulfinyl imines and 3-substituted methyl 2-butenoates. Dienolate formation triggers a Mannich addition followed by an amino-Cope like rearrangement, which results in immediate elimination of fluoride by a lithiated enamine. The newly formed 1,4-diene intermediate