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
Metal-Free Ring-Expansion Reaction of Six-membered Sulfonylimines with Diazomethanes: An Approach toward Seven-Membered Enesulfonamides
作者:An-Jie Xia、Tai-Ran Kang、Long He、Lian-Mei Chen、Wen-Ting Li、Jin-Liang Yang、Quan-Zhong Liu
DOI:10.1002/anie.201508804
日期:2016.1.22
A new metal‐free, ring‐expansion reaction of six‐membered N‐sulfonylimines with unstable diazomethanes, generated in situ from the N‐tosylhydrazones, has been developed. This reaction delivers valuable seven‐membered enesulfonamides by a Tiffeneau–Demjanov rearrangement and intramolecular proton transfer tautomerization process. Moreover, this ring‐expansion reaction can be carried out in a one‐pot
Enantioselective Rhodium-Catalyzed Nucleophilic Allylation of Cyclic Imines with Allylboron Reagents
作者:Yunfei Luo、Hamish B. Hepburn、Nawasit Chotsaeng、Hon Wai Lam
DOI:10.1002/anie.201204004
日期:2012.8.13
Chiral allylrhodium nucleophiles: The highly diastereo‐ and enantioselective title reaction of a range of cyclic imines with various potassium allyltrifluoroborates most likely proceeds via allylrhodium(I) intermediates, and represents the first rhodium‐catalyzedenantioselective nucleophilic allylation of π electrophiles with allylboron compounds.
Enantioselective Rhodium-Catalyzed Coupling of Arylboronic Acids, 1,3-Enynes, and Imines by Alkenyl-to-Allyl 1,4-Rhodium(I) Migration
作者:Michael Callingham、Benjamin M. Partridge、William Lewis、Hon Wai Lam
DOI:10.1002/anie.201709334
日期:2017.12.18
A chiral rhodiumcomplexcatalyzes the highlyenantioselective coupling of arylboronic acids, 1,3-enynes, and imines to give homoallylic sulfamates. The key step is the generation of allylrhodium(I) species by alkenyl-to-allyl 1,4-rhodium(I) migration. tAm=tert-amyl.
手性铑配合物催化芳基硼酸,1,3-烯炔和亚胺的高度对映选择性偶联,得到均烯丙基氨基磺酸盐。关键步骤是通过烯基至烯丙基1,4-铑(I)的迁移生成烯丙基铑(I)。t Am =叔戊基。
The Isomerization of Allylrhodium Intermediates in the Rhodium-Catalyzed Nucleophilic Allylation of Cyclic Imines
作者:Hamish B. Hepburn、Hon Wai Lam
DOI:10.1002/anie.201407233
日期:2014.10.20
Allylrhodium species generated from potassium allyltrifluoroborates can undergo isomerization by 1,4‐rhodium(I) migration to give more complex isomers, which then react with cyclicimines to provide products with up to three new stereochemical elements. High enantioselectivities are obtained using chiral diene–rhodium complexes.