Optically active tetrahydro-.alpha.-phenyl-6,7-dimethoxyisoquinoline-1-methanols from (1-phenylethyl)ureas. Absolute configuration of (-)- and (+)-isomers of the erythro series
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
Mammalian Alkaloids:O-methylation of (S)- and (R)-dideoxynorlaudanosoline-1-carboxylic acid by catecholO-methyltransferase and identification of a yellow pigment obtained at physiological pH
作者:Maria Danuta Rozwadowska、Maria Chrzanowska、Arnold Brossi、Cyrus R. Creveling、Michael E. Bembenek、Creed W. Abell
DOI:10.1002/hlca.19880710703
日期:1988.11.2
optically active 3′,4′-dideoxynorlaudanosoline-l-carboxylic acids 1 with O-methyltransferase in vitro afforded almost exclusively the 7-O-methylated acids 3. A similar result was obtained with the yellow quinonemethide 4A obtained from 1 at neutral or slightly alkaline pH by oxidative decarboxylation and affording the 3,4-dihydroisoquinoline 15 on methylation with catecholO-methyltransferase (COMT). The structure
Aryl Radical Cyclizations of 1-(2‘-Bromobenzyl)isoquinolines with AIBN−Bu<sub>3</sub>SnH: Formation of Aporphines and Indolo[2,1-<i>a</i>]isoquinolines
text] Radical cyclization of alkoxy-substituted 1-(2'-bromobenzyl)-3,4-dihydroisoquinolines 1 with AIBN-Bu3SnH gave 6a,7-dehydroaporphines 2 preferentially. A steric repulsion between the respective alkoxy groups at the 7- and 3'-positions gave 5,6-dihydroindolo[2,1-a]isoquinolines 3 in a "disfavored" 5-endo cyclization mode. Radical cyclizations of the related substrates, such as 1-(2'-bromobenzoyl)isoquinolines
A Three‐Component Synthesis of 3‐Functionally Substituted 5,6‐Dihydropyrrolo[2,1‐
<i>a</i>
]isoquinolines
作者:Almira R. Miftyakhova、Tatiana N. Borisova、Alexander A. Titov、Matvey B. Sidakov、Roman A. Novikov、Ilya V. Efimov、Alexey V. Varlamov、Leonid G. Voskressensky
DOI:10.1002/cbdv.202100584
日期:2022.1
Synthesis of novel C3-substituted 5,6-dihydropyrrolo[2,1-a]isoquinolines via a three-component domino reaction of 1-aroyl-3,4-dihydroisoquinolines, terminal alkynes and CH-acids under microwave irradiation in dry acetonitrile is described. The method developed enables the obtainment of highly functionalized compounds with pharmacophore groups, which are potentially biologically active.
1-芳酰基-3,4-二氢异喹啉、末端炔烃和CH-酸在无水乙腈中微波辐照下三组分多米诺反应合成新型C3-取代的5,6-二氢吡咯并[2,1- a ]异喹啉描述。所开发的方法能够获得具有潜在生物活性的药效团基团的高度功能化化合物。
Three-component synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines from 1-aroyl-3,4-dihydroisoquinolines, electron-deficient alkynes and NH-acids
作者:Almira R. Miftyakhova、Matvey B. Sidakov、Tatiana N. Borisova、Valentina V. Ilyushenkova、Artem N. Fakhrutdinov、Elena A. Sorokina、Alexey V. Varlamov、Leonid G. Voskressensky
DOI:10.1016/j.tetlet.2022.153991
日期:2022.8
The three-component domino reaction involving 1-aroyl-3,4-dihydroisoquinolines, terminal alkynes, and cyclic NH-acids is a new method for the synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines containing in position 3, cyclic nitrogen-containing fragments. The transformation is performed undermicrowaveirradiation in dry acetonitrile at 130 °C.
涉及1-芳酰基-3,4-二氢异喹啉、末端炔烃和环状NH-酸的三组分多米诺反应是合成3位含5,6-二氢吡咯并[2,1- a ]异喹啉的新方法,环状含氮片段。转化是在微波辐射下在 130 °C 的干燥乙腈中进行的。