dienone वाक्य

By using the organozinc addition reaction conditions the other functionality of the dienone and the alkyne are tolerated:
The systematic name of the molecule is 3, 4, 4, 5-tetramethylcyclohexa-2, 5-dienone.
This cationic intermediate subsequently undergoes a 1, 2-hydride NIH shift, yielding a dienone intermediate that then tautomerizes to form the tyrosine product.
In this particular reaction the trapping reagent is " 2, 3, 4, 5-tetraphenylcyclopenta-2, 4-dienone " and one of the final products ( after expulsion of carbon monoxide ) is a cyclooctatetraene:
After FADH 2 binds, dioxygen attacks it at the C4a carbon, leading to a C4a-hydroperoxyflavin intermediate . 4-HPA then binds, and a conformational change sequesters the enzyme's active site from solution, preventing the oxygen from escaping as toxic hydrogen peroxide . 4-HPA is then hydoxylated via a dienone intermediate and released as 3, 4-DHPA; with the peroxide bond broken, C4a-hydroxyflavin releases the remaining oxygen atom by eliminating water and is released from the enzyme as FAD.