Carbon-Based Leaving Group in Substitution Reactions: Functionalization of sp<sup>3</sup>-Hybridized Quaternary and Tertiary Benzylic Carbon Centers
作者:Stuart J. Mahoney、Tiantong Lou、Ganna Bondarenko、Eric Fillion
DOI:10.1021/ol301442z
日期:2012.7.6
Lewis acid promoted substitution reactions employing Meldrum’s acid and 5-methyl Meldrum’s acid as carbon-based leavinggroups are described which transform unstrained quaternary and tertiary benzylic Csp3–Csp3 bonds into Csp3–X bonds (X = C, H, N). Importantly, this reaction has a broad scope in terms of both suitable substrates and nucleophiles with good to excellent yields obtained (typically >90%)
Facile synthesis and biological evaluation of 3,3-diphenylpropanoyl piperazines as T-type calcium channel blockers
作者:Yeon-hee Choi、Du Jong Baek、Seon Hee Seo、Jae Kyun Lee、Ae Nim Pae、Yong Seo Cho、Sun-Joon Min
DOI:10.1016/j.bmcl.2010.11.033
日期:2011.1
We have developed a facile synthesis of 3,3-diphenylpropanamides using Meldrum's acid derivatives as amide coupling components. The in vitro biological evaluation of the title compounds led to the identification of compound 1h, which has good inhibitory activity against T-type calcium channel (IC50 = 0.83 mu M). (C) 2010 Elsevier Ltd. All rights reserved.