Novel total syntheses of oxoaporphine alkaloids enabled by mild Cu-catalyzed tandem oxidation/aromatization of 1-Bn-DHIQs
作者:Bo Zheng、Hui-Ya Qu、Tian-Zhuo Meng、Xia Lu、Jie Zheng、Yun-Gang He、Qi-Qi Fan、Xiao-Xin Shi
DOI:10.1039/c8ra05338c
日期:——
Noveltotalsyntheses of oxoaporphine alkaloids such as liriodenine, dicentrinone, cassameridine, lysicamine, oxoglaucine and O-methylmoschatoline were developed. The key step of these totalsyntheses is Cu-catalyzed conversion of 1-benzyl-3,4-dihydro-isoquinolines (1-Bn-DHIQs) to 1-benzoyl-isoquinolines (1-Bz-IQs) via tandem oxidation/aromatization. This novel Cu-catalyzed conversion has been studied
Copper(<scp>ii</scp>)-catalyzed and acid-promoted highly regioselective oxidation of tautomerizable C(sp<sup>3</sup>)–H bonds adjacent to 3,4-dihydroisoquinolines using air (O<sub>2</sub>) as a clean oxidant
作者:Yun-Gang He、Yong-Kang Huang、Qi-Qi Fan、Bo Zheng、Yong-Qiang Luo、Xing-Liang Zhu、Xiao-Xin Shi
DOI:10.1039/d1ra05671a
日期:——
1-Bn-DHIQs to 1-Bz-DHIQs without concomitant excessive oxidation of 1-Bz-DHIQs to 1-Bz-IQs is very important for the syntheses of 1-Bz-DHIQ alkaloids and analogues. In this article, we developed a novel Cu(ii)-catalyzed and acid-promoted highly regioselective oxidation of tautomerizable C(sp3)-H bonds adjacent to the C-1 positions of various 1-Bn-DHIQs. It was observed that when 0.2 equiv. of Cu(OAc)2·2H2O
Synthesis and Structure Activity Relationship of Tetrahydroisoquinoline-Based Potentiators of GluN2C and GluN2D Containing <i>N</i>-Methyl-<scp>d</scp>-aspartate Receptors
作者:Rose M. Santangelo Freel、Kevin K. Ogden、Katie L. Strong、Alpa Khatri、Kathryn M. Chepiga、Henrik S. Jensen、Stephen F. Traynelis、Dennis C. Liotta
DOI:10.1021/jm400177t
日期:2013.7.11
We describe here the synthesis and evaluation of a series of tetrahydroisoquinolines that show subunit-selective potentiation of NMDA receptorscontaining the GluN2C or GluN2D subunits. Bischler–Napieralski conditions were employed in the key step for the conversion of acyclic amides to the corresponding tetrahydroisoquinoline-containing analogs. Compounds were evaluated using both two-electrode voltage
New synthesis of 1-[(3,4-dimethoxyphenyl)methoxymethyl]-6,7-dimethoxyisoquinoline (setigerine), a naturally occurring alkaloid, and some derivatives of papaverine
作者:Jan Jacobs、Nguyen van Tuyen、Peter Markusse、Christian V. Stevens、Leendert Maat、Norbert De Kimpe
DOI:10.1016/j.tet.2008.11.077
日期:2009.2
A novel and improved synthetic route for the preparation of the new alkaloid setigerine, isolated from Papaver setigerum DC, and some new 3,4-dihydropapaverine and papaverine derivatives is reported. This method is based on the side chain chlorination of 1-benzyl-3,4-dihydroisoquinolines using N-chlorosuccinimide (NCS) and subsequent reaction with sodium methoxide in methanol to give the corresponding
Oxidation of 1-benzyl-3,4-dihydroisoquinolines with cerium(IV) ammonium nitrate (CAN) under mild condition yielded the mixture of corresponding 1-benzylisoquinolines (b-type) and 1-benzoylisoquinolines (a- or c-type) in an equal yields. The selective oxidation products (c-type) can be prepared by using MeCN instead of MeOH. In the antiplatelet assays, four inducers were employed, including AA, Col