Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 870-50-8, formula is C10H18N2O4, Name is Di-tert-butyl diazene-1,2-dicarboxylate. They perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Category: esters-buliding-blocks.
Zhang, Yunfei;Jermaks, Janis;MacMillan, Samantha N.;Lambert, Tristan H. research published 《 Synthesis of 2H-Chromenes via Hydrazine-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis》, the research content is summarized as follows. The catalytic ring-closing carbonyl-olefin metathesis (RCCOM) of O-allyl salicylaldehydes to form 2H-chromenes is described. The method utilizes a [2.2.1]-bicyclic hydrazine catalyst and operates via a [3 + 2]/retro-[3 + 2] metathesis manifold. The nature of the allyl substitution pattern was found to be crucial, with sterically demanding groups such as adamantylidene or diethylidene offering optimal outcomes. A survey of substrate scope is shown along with a discussion of mechanism supported by DFT calculations Steric pressure arising from syn-pentane minimization of the diethylidene moiety is proposed to facilitate cycloreversion. In the presence of a bicyclic hydrazine bis(trifluoroacetate), ethylpentenyloxy aryl aldehydes underwent chemoselective ring-closing carbonyl-olefin metathesis reactions to yield 2H-chromenes via condensation, [3 + 2] cycloaddition, and retro-[3 + 2] cycloaddition reactions. The allylic ether moiety was optimized and was crucial for the success of the metathesis reactions, with sterically demanding groups such as adamantylidene or diethylidene optimal. DFT calculations of transition state structures and barriers in the ring-closing carbonyl-olefin metathesis reactions were performed to explain the effect of olefin structure on the reaction; steric pressure arising from avoidance of syn-pentane interactions by the diethylidene moiety is proposed to facilitate the cycloreversion step.
870-50-8, Di-tert-butyl azodicarboxylate, also known as Di-tert-butyl azodicarboxylate, is a useful research compound. Its molecular formula is C₁₀H₁₈N₂O₄ and its molecular weight is 230.26 g/mol. The purity is usually 95%.
Di-tert-butyl azodicarboxylate is a reagent used in the electrophilic amination of β-keto esters catalyzed by an axially chiral guanidine. Building block in an enantioselective synthesis of 3,6-dihyropyridazines employing organocatalysts such a L-proline or (S)-2-pyrrolidinyl tetrazole. Utilized in the asymmetric Friedel-Crafts amination via a chiral organocatalyst.
Di-tert-butyl azodicarboxylate is a reagent used in the preparation of acyl hydrazinedicarboxylates via photoorganocatalytic hydroacylation of dialkyl azodicarboxylates with aldehydes in presence of phenylglyoxylic acid as photocatalyst., Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics