Synthesis 2018; 50(03): 625-643
DOI: 10.1055/s-0036-1591514
paper
© Georg Thieme Verlag Stuttgart · New York

Highly Stereoselective Synthesis of trans-Dihydronarciclasine Analogues

Gábor Varró
a   Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary   eMail: ikadas@mail.bme.hu
,
Lenke Mattyasovszky
a   Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary   eMail: ikadas@mail.bme.hu
,
Alajos Grün
a   Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary   eMail: ikadas@mail.bme.hu
,
András Simon
b   Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, 1111 Budapest, Hungary
,
a   Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary   eMail: ikadas@mail.bme.hu
,
a   Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary   eMail: ikadas@mail.bme.hu
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Publikationsverlauf

Received: 29. August 2017

Accepted after revision: 05. Oktober 2017

Publikationsdatum:
21. November 2017 (online)


Abstract

Several new trans-dihydronarciclasine analogues were stereo­selectively synthesised by applying our feasible and efficient process developed recently. These new phenanthridone alkaloid derivatives were obtained in both racemic and optically active forms. During their enantioselective syntheses, high selectivities (up to 99% ee) were achieved by using (8S,9S)-9-amino(9-deoxy)epiquinine as an organocatalyst. The modifications, the introduction of ethoxy or methoxy groups, were made in ring A of the phenanthridone scaffold.

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