Answers are grounded in this paper and cite their sources.
This Communication describes a cascade reaction sequence that leads to highly functionalized cyclohexenones starting from reaction of cyclobutenones with alpha-lithio-alpha,beta-unsaturated sulfones and amides. The hexatriene-cyclohexadiene cyclization steps presumed to be involved in these transformations are among the most facile hexatriene electrocyclizations reported thus far.
No takes yet. Share an insight, caveat, or question.
Magomedov et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: