Regio- and Enantioselective Palladium-Catalyzed Allylic Alkylation of Nitromethane with Monosubstituted Allyl Substrates: Synthesis of (<i>R</i>)-Rolipram and (<i>R</i>)-Baclofen
作者:Xiao-Fei Yang、Chang-Hua Ding、Xiao-Hui Li、Jian-Qiang Huang、Xue-Long Hou、Li-Xin Dai、Pin-Jie Wang
DOI:10.1021/jo301506p
日期:2012.10.19
The Pd-catalyzed asymmetric allylic alkylation (AAA) reaction of nitromethane with monosubstituted allyl substrates was realized for the first time to provide corresponding products in high yields with excellent regio- and enantioselectivities. The protocol was applied to the enantioselectivesynthesis of (R)-baclofen and (R)-rolipram.
S-Benzyl isothiouronium chloride as a recoverable organocatalyst for the reduction of conjugated nitroalkenes with Hantzsch ester
作者:Quynh Pham Bao Nguyen、Jae Nyoung Kim、Taek Hyeon Kim
DOI:10.1016/j.tet.2012.05.104
日期:2012.8
The reduction of conjugated nitroalkenes into nitroalkanes with Hantzsch ester using S-benzyl isothiouronium chloride as a recoverableorganocatalyst was successfully accomplished with high yield and excellent chemoselectivity.
Reduction of α,β-unsaturated nitroolefins into nitroalkanes with Hantzsch ester promoted by isothiouronium salts
作者:Sungmin Kang、Haney Lee、Taek Hyeon Kim
DOI:10.1080/00397911.2019.1614627
日期:2019.10.2
Abstract α,β-Unsaturated nitroolefins were reduced into nitroalkanes with a Hantzschester, promoted by S-benzyl isothiouronium iodide. The reactions proceeded successfully to afford the desired products in high yields and with excellent chemoselectivity. Graphical Abstract
Asymmetric Organocatalytic Sequential Reaction of Structurally Complex Cyclic Hemiacetals and Functionalized Nitro-olefins To Synthesize Diverse Heterocycles
作者:Jun-Ping Pei、Ying-Han Chen、Yan-Kai Liu
DOI:10.1021/acs.orglett.8b01386
日期:2018.6.15
Structurally complex cyclic hemiacetals bearing a racemic tetrasubstituted stereocenter have been prepared in a concise manner and were successfully used in an organocatalytic enantioselective sequence to react with functionalized nitro-olefins, providing bicyclic acetal-containing compounds as two separable epimers with excellent stereoselectivity. The reaction showed broad substrate scope, with respect