Rapid annulation of tropolone units via a pyrylium ylide 1,3-dipolar cycloaddition reaction
摘要:
The tropolone subunit of the naturally occurring alkaloid rubrolone aglycon is synthesized via a short reaction sequence starting with a 1,3-dipolar cycloaddition of a pyrylium ylide and indenone, followed by enone oxidation, oxygen-bridge elimination and finally hydroxy group oxidation. (C) 2009 Elsevier Ltd. All rights reserved.
Rapid annulation of tropolone units via a pyrylium ylide 1,3-dipolar cycloaddition reaction
摘要:
The tropolone subunit of the naturally occurring alkaloid rubrolone aglycon is synthesized via a short reaction sequence starting with a 1,3-dipolar cycloaddition of a pyrylium ylide and indenone, followed by enone oxidation, oxygen-bridge elimination and finally hydroxy group oxidation. (C) 2009 Elsevier Ltd. All rights reserved.