ring closure वाक्य
उदाहरण वाक्य
मोबाइल
- Ring closure can be accomplished in the presence of thionyl chloride.
- Baldwin's rules discuss the relative rates of ring closures of these various types.
- In conjunction with the Erding Ring Closure, trains would continue via Dorfen to Salzburg.
- Alkenes with the interacting groups substituted cis to each other also assists in ring closure.
- Aryl systems with the interacting groups substituted ortho to each other assists in ring closure.
- It is produced from 1, 5-dibenzoylnaphthalene by oxidative ( dehydrogenative ) ring closure.
- This is for snooping, ring closures ( see below ), and hot-plugging.
- In aliphatic 4-and 5-oxocarboxylic acids, intervening substituents assists in ring closure.
- The conditions under which these cyclization reactions occur follow Baldwin's rules for ring closure.
- The resulting dialkoxides can then undergo amine displacement and ring closure at 25�C to form tropocoronands 4.
- The ring closure is carried out at high temperatures ( 200 300 �C, 473 573 K ).
- A rearrangement reaction of the carbocation follows with ring closure to "'9 " '.
- In addition, the electronic structure of the transition state differs from that of other conrotary ring closures.
- It was proposed that the methylene of ( + )-Costunolide is reduced before the second ring closure.
- For this step, the Schiff base must be heated to ~ 250 �C for the ring closure to occur.
- The ring closure can even be driven by stereocenters adjacent to the carbon-carbon multiple bond as shown below.
- Subsequent ring closure leads to the formation of the ?-lactam and the regeneration of the chiral nucleophilic organocatalyst.
- The mechanism of ring closure is complex, but involves an aldol condensation at C-2 and C-7.
- This allows for strictosidine s formation under the subsequent ring closure via electrophilic substitution, as shown in the adjacent image.
- Compound XII was formed from condensation of [ carbonyl-14C-]-2-hydroxy-acetophenone with dimethyl oxylate and ring closure.
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