Trimethyl borate/magnesium halide complex-induced one-pot homologation reactions of isoquinoline with dialkyl-TMP-zincate
作者:Hye Ji Seo、Sung Keon Namgoong
DOI:10.1016/j.tetlet.2012.05.002
日期:2012.7
one-pot homologation reactions of isoquinoline with lithium dialkyl-TMP-zincate⋅2MgBrCl/trimethyl borate are described. 1-Alkylisoquinolines (2, 3A, 4A, 5A, 6, and 7) and 1-alkyl-3,4-dihydroisoquinolines (3B, 4B, and 5B) are easily prepared under the presented reaction conditions. The role of the B(OMe)3/MgBrCl complex is examined in these homologation reactions. The specific reaction mechanisms, including
Trimethyl borate-induced one-pot homologation reactions of isoquinoline with di-tert-butyl-TMP zincate
作者:Hye Ji Seo、Soo Jung Yoon、So Hyun Jang、Sung Keon Namgoong
DOI:10.1016/j.tetlet.2011.05.045
日期:2011.7
Novel one-pot homologation reactions of isoquinoline and quinoline with di-tert-butyl-TMP zincate/trimethyl borate are described. 1-tert-Butyl-3,4-dihydroisoquinoline 1 and 1-tert-butylisoquinoline 2 are formed unexpectedly under the presented reaction conditions with relative ease. A reaction mechanism, including 1,2-migration of the tert-butyl group from 1-isoquinolylzincate, is proposed in detail. Migratory aptitudes of other ligands of isoquinolyl zincates are also discussed. (C) 2011 Elsevier Ltd. All rights reserved.
BERGER, U.;DANNHARDT, G.;WIEGREBE, W., ARCH. PHARM., 1984, 317, N 6, 488-495