Novel Use of a Selenoalkyne Within Untraditionally Mild Dötz Benzannulation Processes; Total Synthesis of a Calceolaria andina L. Natural Hydroxylated …
JJ Caldwell, R Colman, WJ Kerr, EJ Magennis
Index: Caldwell; Colman; Kerr; Magennis Synlett, 2001 , # 9 p. 1428 - 1430
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Citation Number: 12
Abstract
Abstract: A total synthesis of the Calceolaria andina L. extract 2-(1, 1-dimethyl-2-propenyl)-3- hydroxy-1, 4-naphthalenedione is described incorporating the first reported Dötz benzannulation of a selenoalkyne. Importantly, it has been shown that it is possible to effect this annulation at ambient temperature under dry state conditions with a significant improvement in cyclisation yield. Key words: carbene complexes, chromium, Dötz ...
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