Regioselective synthesis of 2-amino-isophthalonitriles through a ring transformation strategy
作者:Fateh V. Singh、Vijay Kumar、Brijesh Kumar、Atul Goel
DOI:10.1016/j.tet.2007.08.056
日期:2007.11
An expeditioussynthesis of several 2-amino-isophthalonitriles and their biaryl compounds is described and illustrated by carbanion-induced ring transformation of functionalized 2H-pyran-2-ones with malononitrile in excellent yields. The strength of the reaction lies in the creation of an aromatic ring at room temperature from six-membered lactones under mild reaction conditions. This approach is an
Base-mediated alternate route for multi-functionalized allylbenzenes using ring transformation strategy
作者:Samata E. Shetgaonkar、Fateh V. Singh
DOI:10.1080/00397911.2020.1782430
日期:2020.8.17
Abstract A simple yet innovative approach for the construction of multi-substituted allylbenzenes 14, 16 and 18 with ‘donor-acceptor’ functionalities has been delineated through base-mediated ring transformation of 6-aryl-2H-pyran-2-ones 13, 15 and 17 respectively with commercially available 5-hexen-2-one 11 as carbanion source. The reactions were carried out at room temperature without using any catalyst
simple, efficient and transition metal-free strategy was established for the synthesis of highly functionalized, stericallyhindered allylarenes (6, 7 & 8) by base-mediated ring transformation of 2-oxo-6-aryl-4-(methylthio/sec-amino)-2H-pyran-3-carbonitriles (3/4) with 5-hexene-2-one (5). This provides a method for the synthesis of allylarenes functionalized with different electron donating and withdrawing
Regioselective synthesis of functionally congested biaryls through a novel C–C bond formation reaction
作者:Atul Goel、Fateh Veer Singh
DOI:10.1016/j.tetlet.2005.06.034
日期:2005.8
An expeditioussynthesis of unsymmetrical biaryls functionalized with electron-withdrawing or -donating substituents is described and illustrated by the carbanion-induced ring transformation of 2H-pyran-2-ones with malononitrile in excellent yields.