Silver-catalyzed decarboxylative C–H functionalization of cyclic aldimines with aliphatic carboxylic acids
作者:Jingjing Wang、Xue Liu、Ziyan Wu、Feng Li、Tingting Qin、Siyuan Zhang、Weiguang Kong、Lantao Liu
DOI:10.1016/j.cclet.2021.03.011
日期:2021.9
Silver-catalyzeddecarboxylative C–H alkylation of cyclic aldimines with abundant aliphaticcarboxylicacids has been realized under mild reaction conditions generating the corresponding products in moderate to good yields (32%–91%). In addition, a gram-scale reaction, late-stage modification of drug, synthetic transformation of the product, and further application of the catalytic strategy were also
tert-Butoxide mediated cascade desulfonylation/arylation/hydrolysis of cyclic sulfonyimines using diaryliodonium salts: synthesis of diaryl ether derivatives bearing a 2-aldehyde group
作者:Xiaofei Qian、Jianwei Han、Limin Wang
DOI:10.1039/c6ra19313g
日期:——
Cascades of cyclic sulfonyimines mediated by tBuOK with diaryliodonium salts has been developed, giving the diaryl ethers in good yields. Furthermore, bulky ortho-substituted diaryl ethers with an aldehyde group can be obtained easily in comparision with metal-catalyzed protocols.
Catalytic alkenylation of γ-substituted butenolides with cyclic N -sulfonylated imines in water leading to α-arylidene butenolide derivatives
作者:Feng Li、Jingjing Wang、Wenlong Pei、Hai Ma、Hong Li、Mingyue Cui、Shuxin Peng、Shihui Wang、Lantao Liu
DOI:10.1016/j.tetlet.2018.06.062
日期:2018.8
An efficient Et3N-catalyzed alkenylation of γ-substituted deconjugated butenolides with cyclic N-sulfonylated imines in water is described. The reaction proceeds efficiently under mild reaction conditions to give α-arylidene butenolide derivatives in high yield (82–96%).
An efficient (3 + 2) cycloaddition triggered annulation is reported to access 1,3-benzoxazepine frameworks. With amine base, sulfamate-derived cyclicimines readily react with glycine aldimino esters to furnish benzo-fused seven-membered heterocyclic products in good yields. The cascade reaction involves the formation of one C–C, one C–N, and one C–O bond along with the cleavage of two C–N bonds and
cross-dehydrogenative coupling of cyclic aldimines with aliphatic amines has been developed, which represents the first example of visible-light-induced C–H amination of N-sulfonylated imines. This methodology enables the streamline assembly of amine derivativesvia radical mediated C–Nbond formation. The current protocol features transition-metal-free, mild conditions, good functional group tolerance and