The most recent comprehensive review of the chemistry of allenes appeared in
1966.'Shorter reviews of specific aspects of allene chemistry have appeared more recently …

Structural limitations in hydrocarbons have posed a longstanding challenge to chemists. 1
One highly fun-damental question is the incorporation of multiple bonds in small cyclic …

Strained cyclic organic molecules, such as arynes, cyclic alkynes and cyclic allenes, have
intrigued chemists for more than a century with their unusual structures and high chemical …

Publisher Summary Benzo [c] furans (isobenzofurans) constitute a unique class of π-
excessive heterocyclic compounds that can be derived from the isoconjugated indenyl …

The study of strained-ring compounds has a long and glorious history in organic chemistry.
Distortionsof a bonds, as typified by cyclopropane, were of earliest concern and are …

We report the first 1, 3-dipolar cycloadditions of 1, 2-cyclohexadiene, a rarely exploited
strained allene. 1, 2-Cyclohexadiene is generated in situ under mild conditions and trapped …

A new convergent synthesis of 1, 4-benzoquinones from4-alkynyl-4-alkoxy (or hydroxy or
trimethylsilyloxy) cyclobutenones is described. The required cyclobutenones are prepared …

Strained allenes, such as 1, 2-cyclohexadiene, undergo facile Diels− Alder reactions with
otherwise unreactive dienes. Substituted cyclohexa-1, 2-dienes add to furan via a Diels …

We have quantum chemically studied the reactivity, site‐, and regioselectivity of the 1, 3‐
dipolar cycloaddition between methyl azide and various allenes, including the archetypal …

In this report we will consider reactions of acetylenic substrates which require the triple bond
to become part of an intramolecular pericyclic transition state. Only those processes will be …