This approach also has the advantage that the thermal ( disrotatory ) ring closure can not take place because of steric hindrance between the substitution groups.
22.
Conversely in a polyene of 4n + 2 ?-electrons, an electrocyclic ring closure is disrotatory under thermal conditions and conrotatory under photochemical conditions.
23.
As part of the Erding Ring Closure ( " Erdinger Ringschluss " ) project, the airport will also be linked to eastern Bavaria.
24.
Considering the electrocyclic ring closure of the substituted 1, 3-butadiene, the reaction can proceed through either a conrotatory or a disrotatory reaction mechanism.
25.
The peptide has several unusual features, including four ring closure reaction is catalyzed by two C-terminal thioesterase domains of Txo2, forming a lactone.
26.
If a generalized electrocyclic ring closure occurs in a polyene of 4n ?-electrons, then it is conrotatory under thermal conditions and disrotatory under photochemical conditions.
27.
Intramolecular attack of the electrophilic carbonyl carbon by the nitrogen, resulting in a 5-membered ring closure of the positively charged "'6 " '.
28.
For ring closing reactions, it is an example of enantioselectivity, wherein a single enantiomer of a cyclization product is formed from the selective ring closure of the starting material.
29.
The diradical mechanism has been supported by Homolysis of the weakest bond in azulene occurs, followed by a hydrogen shift and ring closure so as to retain the aromaticity of the molecule.
30.
The "'Erding ring closure "'( ) is a project to build a long, double-track railway that is planned to run from Munich Airport to Erding.
