In cyclizations of this type, the ENDO isomer places the substituents on the dipolarophile anti to the oxido bridge. Accordingly, the EXO isomer is the one in which these substituents are syn to the …

The nitrone-olefin (3+2) cycloaddition reaction is the combination of a nitrone with an alkene or alkyne to generate an isoxazoline or isoxazolidine via a (3+2) cycloaddition process. [1]

This page covers common cycloaddition reactions, including the Diels-Alder reaction, ene reaction, photo [2+2], ketene [2+2], and 1,3-dipolar cycloadditions, and discusses why some are promoted by …

Aug 12, 2022 · Here, the authors describe [3+2] cycloadditions of various internal alkynes with readily accessible aliphatic aldehydes via photoinduced decatungstate catalysis.

This review briefly introduces the history of Lu's [3 + 2] cycloaddition reaction and highlights the important developments and synthetic applications with respect to Lu's [3 + 2] cycloaddition reaction.

The participation of 3,3,3-trichloro-1-nitroprop-1-ene in the [3+2] cycloaddition reaction with selected nitrile N-oxides in the light of the experimental and MEDT quantum chemical study.

A [3+2] cycloaddition involves a molecule with three pi electrons and another with two pi electrons. These reactions often involve special molecules called 1,3-dipoles, which have an uneven …

The 3+2 cycloaddition is a useful reaction to create a 5-membered ring with some heteroatoms (usually N, O, and S). In this reaction, due to the uneven number of bonds, one of the reactants must have a …

Abstract The (3+2)-cycloaddition reaction involving oxyallyl cations has proven to be a versatile and efficient approach for the construction of five-membered carbo- and heterocycles, which are …

In this notation, a Diels-Alder reaction is a [4+2]-cycloaddition and a 1,3-dipolar addition such as the first step in ozonolysis is a [3+2]-cycloaddition.