Synthesis 2014; 46(20): 2789-2793
DOI: 10.1055/s-0034-1378521
paper
© Georg Thieme Verlag Stuttgart · New York

A Concise Synthesis of 1-Oxygenated Carbazole Alkaloids, Clausine E and Clausine F

Durga P. Kamat
Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India   eMail: stilve@unigoa.ac.in
,
Sonia B. Parsekar
Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India   eMail: stilve@unigoa.ac.in
,
Vijayendra P. Kamat
Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India   eMail: stilve@unigoa.ac.in
,
Santosh G. Tilve*
Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India   eMail: stilve@unigoa.ac.in
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Publikationsverlauf

Received: 06. Mai 2014

Accepted after revision: 25. Juni 2014

Publikationsdatum:
30. Juli 2014 (online)


Abstract

A rapid entry into naturally occurring and biologically important 1-oxygenated carbazole clausine E was established through Wittig reaction and annulation. Further O-prenylation of clausine E by Mitsunobu reaction followed by p-Claisen rearrangement delivered clausine F.