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。