Synthetic Utility of Alkenylcyclobutenedione Monoketals. Michael Additions and the Synthesis of a Natural Benzofuranosesquiterpenequinone
摘要:
A new synthetic route to highly substituted cyclobutenones is reported. This involves the 1,6-addition of both heteroatom- and carbon-based nucleophiles to 4,4-dimethoxy-3-ethenyl-2-methylcyclobuten-1-one (8) to give further functionalized cyclobutenedione monoketals. These ketals function as precursors to quinones as illustrated by the synthesis of the natural benzofuranosesquiterpene 23.
Synthetic Utility of Alkenylcyclobutenedione Monoketals. Michael Additions and the Synthesis of a Natural Benzofuranosesquiterpenequinone
摘要:
A new synthetic route to highly substituted cyclobutenones is reported. This involves the 1,6-addition of both heteroatom- and carbon-based nucleophiles to 4,4-dimethoxy-3-ethenyl-2-methylcyclobuten-1-one (8) to give further functionalized cyclobutenedione monoketals. These ketals function as precursors to quinones as illustrated by the synthesis of the natural benzofuranosesquiterpene 23.
Synthetic Utility of Alkenylcyclobutenedione Monoketals. Michael Additions and the Synthesis of a Natural Benzofuranosesquiterpenequinone
作者:Hui Liu、Leah M. Gayo、Robert W. Sullivan、Angela Y. H. Choi、Harold W. Moore
DOI:10.1021/jo00091a013
日期:1994.6
A new synthetic route to highly substituted cyclobutenones is reported. This involves the 1,6-addition of both heteroatom- and carbon-based nucleophiles to 4,4-dimethoxy-3-ethenyl-2-methylcyclobuten-1-one (8) to give further functionalized cyclobutenedione monoketals. These ketals function as precursors to quinones as illustrated by the synthesis of the natural benzofuranosesquiterpene 23.