Rh<sub>2</sub>(OAc)<sub>4</sub>-AgOTf Cooperative Catalysis in Cyclization/Three-Component Reactions for Concise Synthesis of 1,2-Dihydroisoquinolines
作者:Zhenqiu Guo、Mei Cai、Jun Jiang、Liping Yang、Wenhao Hu
DOI:10.1021/ol902409u
日期:2010.2.19
Dirhodium acetate and silver triflate cooperatively catalyzed tandem cyclization/three-component reactions of 2-alkynylarylaldimines with diazo compounds and water or alcohols are reported to afford 1,2-dihydroisoquinolines bearing α-hydroxyl-β-amino carboxylate skeleton in high yield.
Regioselective synthesis of functionalized dihydroisoquinolines from o-alkynylarylaldimines via the Reformatsky reaction
作者:Tohasib Yusub Chaudhari、Urvashi Urvashi、Sandeep K. Ginotra、Pooja Yadav、Gulshan Kumar、Vibha Tandon
DOI:10.1039/c6ob01790h
日期:——
of functionalized 1,2-dihydroisoquinolines from o-alkynylarylaldimines via the Reformatskyreaction without the aid of an external Lewis acid has been described. The chemistry involves the dual role of the Reformatsky reagent which has been generated in situ in the reaction. We propose that one molecule of the Reformatsky reagent is being utilised for the activation of alkynes, whereas the second molecule
Silver-catalyzed tandem cycloisomerization/hydroarylation reactions and mechanistic investigations for an efficient access to 1,2-dihydroisoquinolines
作者:Maxime De Abreu、Yue Tang、Etienne Brachet、Mohamed Selkti、Véronique Michelet、Philippe Belmont
DOI:10.1039/d0ob02197k
日期:——
An efficient silver-catalyzed tandem reaction for the formation of 1,2-dihydroisoquinoline derivatives is herein reported. Highly functionalized multiheterocyclic scaffolds are accessible in a straightforward manner using readily accessible starting materials under mild conditions. This methodology offers an attractive route for the synthesis and development of a biologically relevant new heterocyclic
method for 1,2-dihydroisoquinolines via the 6-endo-dig cyclization of 2-alkynylaldimines and nucleophilic addition has been developed. When the 2-alkynylaldimines were reacted with various nucleophiles such as nitromethane, dimethyl malonate, phenylacetylene, hydrosilane, allylstannane, and ketene silyl acetal in the presence of a rhenium catalyst, the corresponding 1,2-dihydroisoquinolines were obtained
Rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines by the intramolecular cyclization of 2-alkynylaldimines or 2-alkynylbenzylamines
rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines has been developed. When the 2-alkynylarylaldimines were reacted with various pronucleophiles, such as nitromethane, dimethyl malonate, and phenylacetylene, in the presence of a rhenium catalyst, cyclization and subsequent nucleophilic addition proceeded to give the corresponding 1,2-dihydroisoquinolines in moderate to good yields