| Caesium salts sometimes replace potassium or sodium salts in organic synthesis, such as cyclization, esterification, and polymerization. |
| The cyclization product underwent additional oxidation reactions leading to aromatization. |
| The dianion 48 is unlikely to cyclize, but cyclization could occur after proton transfer from another molecule of 44, thereby forming the enolate 49 which will not undergo any reduction. |
| Finally, the stereochemistry of stable cyclization products following the isomerization might provide experimental proof as discussed in the following section. |
| The polymerized intermediate products can further undergo cracking, isomerization, cyclization, aromatization and condensation reactions. |
| As amber matures over the years, more polymerization takes place as well as isomerization reactions, crosslinking and cyclization. |
