Synthesis 2019; 51(02): 552-556
DOI: 10.1055/s-0037-1610909
paper
© Georg Thieme Verlag Stuttgart · New York

Total Synthesis of the Natural Pyridocoumarins Goniothaline A and B

Sungwan Ahn
,
Jeong A Yoon
,
Young Taek Han*
College of Pharmacy, Dankook University, Dandae-ro 119, Cheonan 31116, Republic of Korea   Email: hanyt@dankook.ac.kr
› Author Affiliations
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (NRF-2017R1C1B1001826).
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Publication History

Received: 30 July 2018

Accepted after revision: 23 August 2018

Publication Date:
17 September 2018 (online)


Abstract

In this paper, we report the first total synthesis of goniothaline A and B, which are rare natural pyridocoumarins isolated from Goniothalamus australis. The key feature of the synthesis of goniothaline A is high-yielding silver-catalyzed cycloisomerization to afford the pyridine moiety. In addition, goniothaline B, a natural 8-hydroxyquinoline derivative, is readily synthesized by the regioselective demethylation of goniothaline A.

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