Synthesis of Polysubstituted Isoquinolines and Related Fused Pyridines from Alkenyl Boronic Esters via a Copper-Catalyzed Azidation/Aza-Wittig Condensation Sequence
作者:Vankudoth Jayaram、Tailor Sridhar、Gangavaram V. M. Sharma、Fabienne Berrée、Bertrand Carboni
DOI:10.1021/acs.joc.7b02831
日期:2018.1.19
An efficient and straightforward synthesis of isoquinolines is reported from internal alkenyl boronic esters, easily prepared from the corresponding 1,2-bis(boronates), via a sequential copper-catalyzed azidation/aza-Wittig condensation. This synthetic method has been used to synthesize quinisocaine, a topical anesthetic used for the treatment of pain and pruritus, and further extended to thieno[2
据报道,内部的烯基硼酸酯可以通过连续的铜催化的叠氮化/氮杂-维蒂希缩合反应,由相应的1,2-双(硼酸酯)轻松制备,从而可以高效,直接地合成异喹啉。该合成方法已用于合成奎尼卡因,奎尼卡因是一种用于治疗疼痛和瘙痒的局部麻醉剂,并在第一步中通过使用2-噻吩甲醛作为偶联伙伴进一步扩展为噻吩并[2,3- c ]吡啶。
Facile Synthesis of 3-Substituted Isoquinolines Derivatives via Microwave-assisted Tandem Three-component Coupling Cyclization
作者:Long Lin、Qiongyou Wu、Shaowei Huang、Guangfu Yang
DOI:10.1002/cjoc.201100560
日期:2012.5
A novel three‐component reaction of o‐bromobenzaldehyde, terminal alkynes and tert‐butyl amine has been established, which proceeded smoothly to give 3‐substituted isoquinolines in good yields in the presence of palladium/copper catalysts under microwave irradiation.
spirocyclic NHC Ir(III) complex (SNIr), generating a variety of heteroarylsilanes. A significant advantage of this catalytic system is that multiple types of intermolecular C–H silylation can be achieved using one catalytic system at α, β, γ, or δ positions of heteroatoms with excellent regioselectivities. Mechanistic experiments and DFT calculations indicate that the polycyclic ligand of SNIr can form an
The present invention relates a specific tetrahydroisoquinoline compound which is useful as a chemokine receptor type 3 (CCR3) antagonist, and a pharmaceutical composition comprising the same as an active ingredient. The tetrahydroisoquinoline compound of the present invention is useful for the treatment or prevention of a disease in which CCR3 participates.
Asymmetric hydrogenation of isoquinolines with chiral cationic ruthenium diamine catalysts
作者:Zi-Qi Yi、Fei Chen、Yan-Mei He、Qing-Hua Fan
DOI:10.1016/j.tet.2023.133736
日期:2023.12
general asymmetrichydrogenation of isoquinolines catalyzed by chiral cationic ruthenium catalysts has been investigated. A wide range of isoquinoline derivatives, including 1-substituted, 3-substituted, 1,3-disubstituted and 3,4-disubstituted isoquinolines, were efficiently hydrogenated to give chiral tetrahydroisoquinolines with up to 92 % ee and >20:1 dr. It was found that the ruthenium catalyst bearing
研究了手性阳离子钌催化剂催化的异喹啉的一般不对称氢化。多种异喹啉衍生物,包括 1-取代、3-取代、1,3-二取代和 3,4-二取代异喹啉,可有效氢化得到手性四氢异喹啉,其 ee 高达 92%,dr 大于 20:1。研究发现,带有非配位BArF阴离子的钌催化剂具有高对映选择性。初步机理研究表明,异喹啉通过逐步途径还原,包括1,2-氢化物加成、异构化和2,3-氢化物加成。