Cinchonidine-Catalyzed Synthesis of Oxazabicyclo[4.2.1]nonanones from <i>N</i>-Aryl-<i>α,β</i>-unsaturated Nitrones and 1-Ethynylnaphthalen-2-ols
作者:Cui Wei、Zhou Zhou、Guang-Li Pang、Cui Liang、Dong-Liang Mo
DOI:10.1021/acs.orglett.2c01049
日期:2022.6.17
1]nonanone derivatives were prepared in good yields through a cinchonidine-catalyzed cascade reaction of N-aryl-α,β-unsaturated nitrones and 1-ethynylnaphthalen-2-ols. Mechanistic studies show that the reaction undergoes a [4 + 3] cycloaddition of nitrones to vinylidene o-quinone methide generated in situ from 1-ethynylnaphthalen-2-ols in the presence of cinchonidine, 1,3-rearrangement of N–O vinyl moieties