Information om | Engelska ordet CYCLIZATION

Exempel på hur man kan använda CYCLIZATION i en mening

• A predicted method of biosynthesis of thymol in thyme and oregano begins with the cyclization of geranyl diphosphate by TvTPS2 to γ-terpinene.
• Under kinetically controlled conditions, this process generally results in exo cyclization and forms bridged ring systems like those found in picrotoxin.
• The Nazarov cyclization reaction is a named electrocyclic reaction converting divinylketones to cyclopentenones.
• In biomolecules, oxazoles result from the cyclization and oxidation of serine or threonine nonribosomal peptides:.
• Condensation of succinosuccinate esters with aniline followed by cyclization affords dihydroquinacridone, which are readily dehydrogenated.
• A lactam is a cyclic amide, formally derived from an amino alkanoic acid through cyclization reactions.
• The Camps quinoline synthesis (also known as the Camps cyclization) is a chemical reaction whereby an o-acylaminoacetophenone is transformed into two different hydroxyquinolines (products A and B) using hydroxide ion.
• The Algar–Flynn–Oyamada reaction is a chemical reaction whereby a chalcone undergoes an oxidative cyclization to form a flavonol.
• The oxetane ring can also be formed through diol cyclization as well as through decarboxylation of a six-membered cyclic carbonate.
• The charged aniline forms a decent enough leaving group for an electrophilic cyclization to form intermediate 5, which quickly aromatizes and tautomerizes to give the desired indole 7.
• In an intramolecular version of the Reissert reaction, a furan ring-opening provides the carbonyl necessary for cyclization to form an indole.
• In organic chemistry, Madelung synthesis is a chemical reaction that produces (substituted or unsubstituted) indoles by the intramolecular cyclization of N-phenylamides using strong base at high temperature.
• Aromas can be formed via amino acid decomposition, Maillard reaction, sugar cyclization, and lipid oxidation.
• In Mechanism I, the elimination occurs with imine formation after cyclization; while in Mechanism II, the elimination yields the nitrilium intermediate prior to cyclization.
• The proposed biosynthesis begins with the cyclization of farnesyl diphosphate (FPP) to (+)-germacrene A by a sesquiterpene synthase.
• Protonation of the keto moiety (1) is followed by cyclization (2) and dehydration (3), the oxazole ring is less basic that the starting 2-acylamidoketone and so may be readily neutralized (4).
• Unsubstituted 1,2,4-triazole can be prepared from thiosemicarbazide by acylation with formic acid followed by cyclization of 1-formyl-3-thiosemicarbazide into 1,2,4-triazole-3(5)-thiol; oxidation of the thiol by nitric acid or hydrogen peroxide yields 1,2,4-triazole.
• The driving force for the cyclization reaction was attributed to entropic favorability by forming two molecules per one molecule of starting material.
• Biosynthesis of mevastatin is primarily accomplished via a type 1 PKS pathway it proceeds in the PKS pathway as seen in figure 1 until it reaches a hexaketide state where it undergoes a Diels-Alder cyclization.
• Under UV irradiation, stilbene and its derivatives undergo intramolecular cyclization, called stilbene photocyclization to form dihydrophenanthrenes.

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