Progress towards the total synthesis of the welwitindolinone alkaloids and the discovery of a novel tandem O-H insertion Conia-ene cyclization
The broth of blue-green algae Hapalosiphon wewitschii and Westiella intricate was shown to possess interesting biological activity, including insecticidal and P-glycoprotein inhibiting capabilities. Upon further investigation, the welwitindolinone alkaloids were isolated from the lipophilic extracts and shown to be responsible for the observed biological activity. Herein are described efforts towards the total synthesis of the welwitindolinone alkaloids and novel chemistry developed in the process. In efforts towards N-methylwelwitindolinone C isothiocyanate, we employed a sequential O-H insertion ...
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