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...=Tsutomu|title=Exclusive Formation of α-Methyleneoxetanes in Ketene−Alkene Cycloadditions. Evidence for Intervention of Both an α-Methyleneoxetane and the Subsequent ...

...P]] for direct esterification of hindered alcohols; Regiochemistry of 3+2 cycloadditions<ref>''J. Org. Chem.'' '''1991''', ''56'', 2775; ''Synthesis'' '''1997''', 3 ...tor = Hassner, Alfred | year = 2008| title = Synthesis of Heterocycles via Cycloadditions II ...

==== [1+2] Cycloadditions ==== ...let [[carbenes]].<ref name="Liu 2018" /> Like carbenes, they undergo [1+2] cycloadditions with alkynes and azides to afford three membered ring derivatives such as d ...

=== Cycloadditions === ...cobalt and copper have been reported to catalyze thermally-forbidden [2+2] cycloadditions via single electron transfer. ...

...N₄ ring.<ref name=PPaetz/> One of the widely investigated [2+2]-cycloadditions is the reaction of aldehydes and ketones. ...

...O₂ then adds to the substrate in a variety of ways including: [[cycloadditions]] (most commonly [4+2]), addition to double bonds to yield [[1,2-Dioxetane| ...

...cite journal|last1=Wender|first1=a|title=Synthetic studies on arene-olefin cycloadditions. XII. Total synthesis of (±)-subergorgic acid|journal=Tetrahedron Letters|v ...

...m; however, the corresponding diradicaloids could be trapped through [2+2] cycloadditions with alkynes, thereby providing evidence for their existence. Calculations ...