Reductive Formylation of Isoquinoline Derivatives with Formamide and Synthesis of 2-Formyltetrahydroisoquinolines
作者:Atanas P. Venkov、Ilian I. Ivanov
DOI:10.1080/00397919808006842
日期:1998.4
Reductive formylation of isoquinoline derivatives as 3,4-dihydroisoquinolines 1, enamines and enamides of tetrahydroisoquinoline 2 and the reaction of 2-(2-acylphenyl)ethylamides 3 with formamide afforded the corresponding N-formyltetrahydroisoquinolines 4 and N-acyltetrahydroisoquinolines 5.
Synthesis of benzyl substituted tetrahydropyridines and 1,2,3,4-tetrahydroisoquinolines via acid catalyzed cyclization of γ,δ-unsaturated N-formyl-N-styryl amines
作者:Gerrit J. Meuzelaar、Leendert Maat、Roger A. Sheldon
DOI:10.1016/s0040-4020(99)00136-2
日期:1999.4
Acid-catalyzedcyclization of N-(3-methylbut-3-enyl)-N-styrylformamides 1–3 in the presence of 9-BBN triflate gave access to 2-benzyl-1-formyl-4-methyl-1,2,5,6-tetrahydropyridines 4a–6a and minor amounts of the isomeric 1,2,3,6-tetrahydropyridines 4b–6b. Triflic acidcatalyzedcyclization of N-2-(arylethyl)-N-styrylformamides 7, 8 gave the corresponding 1-benzyl-2-formyl-1,2,3,4-tetrahydroisoquinolines