A convenient synthesis for new SCH 23390 analogues bearing different substituents at the C-1 position has been developed by using the diastereoselective Stevensrearrangement. This procedure has provided a good number of new 1,2-disubstituted 1H-3-benzazepines, either through isolation of the isoquinolinium salts or directly by using a new one-pot N-alkylation–Stevens rearrangement reaction.
Reactions of 3,4-dihydroisoquinolines and dihydrothieno[3,2-c]pyridines with benzyne
作者:Natalia I. Guranova、Alexey V. Varlamov、Valentina V. Ilyushenkova、Ekaterina A. Sokolova、Tatiana N. Borisova、Alexander V. Aksenov、Viktor N. Khrustalev、Leonid G. Voskressensky
DOI:10.1016/j.mencom.2017.09.026
日期:2017.9
Cyanomethyl-substituted tetrahydroisoquinolines and tetrahydrothieno[3,2-c]pyridines were synthesized by multicomponent reaction of the dihydro analogues of aforesaid systems with benzyne and acetonitrile. The products obtained relate to alkaloids of isoquinoline family of 1,2,3,4-tetrahydro level.
A new approach to construction of isoindolo[1,2-a]isoquinoline alkaloids Nuevamine, Jamtine, and Hirsutine via IMDAF reaction
作者:Fedor I. Zubkov、Julya D. Ershova、Anna A. Orlova、Vladimir P. Zaytsev、Eugeniya V. Nikitina、Alexandr S. Peregudov、Atash V. Gurbanov、Roman S. Borisov、Victor N. Khrustalev、Abel M. Maharramov、Alexey V. Varlamov
DOI:10.1016/j.tet.2009.02.024
日期:2009.5
The interaction between 1-furyl-1,2,3,4-tetrahydroisoquinolines and Unsaturated acids derivatives (acryloyl, methacryloyl, and crotonoyl chloride, maleic and citraconic anhydride) was studied. It was shown that the reaction proceeds via amide formation and Subsequent intramolecular Diels-Alder reaction of the furan (IMDAF). The [4+2] cycloaddition proceeded under mild reaction conditions (25-80 degrees C) and afforded only the exo-adduct in a high yield. With this method, a new approach to the isoindolo[1,2-a]isoquinoline system, the basic structural element of alkaloids Jamtine, Hirsutine, and Nuevamine, is proposed. (C) 2009 Elsevier Ltd. All rights reserved.