Regioselective quadruple domino aldolization/aldol condensation/Michael/SNAr-cyclization: construction of hexacyclic indeno-fused C-nor-D-homo-steroid frameworks
作者:Tanmoy Chanda、Sushobhan Chowdhury、B. Janaki Ramulu、Suvajit Koley、Raymond C.F. Jones、Maya Shankar Singh
DOI:10.1016/j.tet.2014.01.059
日期:2014.3
An operationally simple and highly atom-economic anionic quadruple domino reaction sequence for the synthesis of hexacyclic indeno-fused naphthalene/quinoline molecules having structural resemblance with the C-nor-D-homo-steroid nucleus has been developed. Promoter and solvent specificity, regioselectivity and mechanistic details were experimentally established. Catalyst concentration and solvent dependent switching of domino steps creating four new C-C bonds are discussed. (C) 2014 Elsevier Ltd. All rights reserved.