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Rearrangement of 4-alkynylcyclobutenones: a new synthesis of 1,4-benzoquinones

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This article is published in Journal of the American Chemical Society.The article was published on 1989-02-01. It has received 88 citations till now.

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The application of cyclobutane derivatives in organic synthesis.

TL;DR: Transformation of Cyclobutane Derivatives inNatural Product Syntheses: A Review of the Transformations in Organic Syntheses.
Journal ArticleDOI

Biradical formation from acyclic conjugated eneyne-allene system related to neocarzinostatin and esperamicin-calichemicin

TL;DR: Acyclic conjugated allenylphosphine oxide 4b prepared by three step operations was stable at ambient temperature and underwent Bergman type cyclization to form biradical 5b at 37 °C as discussed by the authors.
Journal ArticleDOI

Concerted reactions that produce diradicals and zwitterions: electronic, steric, conformational, and kinetic control of cycloaromatization processes.

TL;DR: The data suggested that products from both polar and free radical reaction pathways arise either from a single reactive intermediate or from a pair of rapidly equilibrating species, which suggests that the partitioning between the diradical and zwitterionic pathways occurs after the rate-determining TS.
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