14447-04-2Relevant academic research and scientific papers
Total Synthesis of (+)-Trachyspic Acid 19-n-Butyl Ester
Rafaniello, Alex A.,Rizzacasa, Mark A.
, (2020)
The first total synthesis of the alkyl citrate trachyspic acid 19-n-butyl ester (1) is described. A formal [2 + 2]-cycloaddition of the silylketene acetal derived from lactone 6 with di-n-butylacetylene dicarboxylate 7 provided the cyclobutene diester 5 w
Nonmigratory internal plasticization of poly(vinyl chloride) via pendant triazoles bearing alkyl or polyether esters
Higa, Chad M.,Tek, Andy T.,Wojtecki, Rudy J.,Braslau, Rebecca
, p. 2397 - 2411 (2018)
Branched and linear nonmigratory internal plasticizers attached to PVC by a pendant triazole linkage were synthesized and investigated. Copper-free azide-alkyne thermal cycloaddition was employed to covalently bind triazole-based phthalate mimics to PVC. To systematically investigate the effect of plasticizer structure on glass transition temperature, several architectural motifs were explored. Free volume theory was considered when designing many of these internal plasticizers: hexyl-tethers were utilized to generate additional space between the triazole-phthalate mimic and the polymer backbone. Miscibility of these triazole-plasticizers in PVC is important: variation of the ester moieties on the triazole possessing alkyl and/or poly(ethylene oxide) chains produced a wide range of glass transition temperatures (Tg): from anti-plasticizing 96 °C, to highly efficient plasticized materials exhibiting Tg values as low as ?42 °C.
Three-Component Coupling Reactions of Aryne, DMSO, and Activated Alkyne: Stereoselective Synthesis of 2-[(o-Methylthio)aryloxy]-Substituted Dialkyl Maleates
Hazarika, Hemanta,Neog, Kashmiri,Sharma, Abhilash,Das, Babulal,Gogoi, Pranjal
, p. 5846 - 5854 (2019/05/06)
A transition-metal-free coupling reaction of aryne, DMSO, and activated alkyne for the synthesis of 2-[(o-methylthio)aryloxy]-substituted dialkyl maleates is reported. This cascade process is associated with several bond cleavage as well as bond formation
Hypervalent iodine(iii)-induced oxidative [4+2] annulation of o-phenylenediamines and electron-deficient alkynes: Direct synthesis of quinoxalines from alkyne substrates under metal-free conditions
Okumura, Sota,Takeda, Youhei,Kiyokawa, Kensuke,Minakata, Satoshi
supporting information, p. 9266 - 9268 (2013/10/01)
Hypervalent iodine(iii)-induced oxidative [4+2] annulation of o-phenylenediamines and electron-deficient alkynes under metal-free conditions has been developed. The reaction allows for direct access to quinoxalines bearing two electron-withdrawing groups in an efficient manner.
Preparation of unsymmetrical dialkyl acetylenedicarboxylates and related esters by enzymatic transesterification
Sultan, Nisrine,Thomas, Coralie,Blanco, Luis,Deloisy, Sandrine
scheme or table, p. 3443 - 3446 (2011/06/27)
An unexpected highly selective mono-transesterification of symmetrical acetylenedicarboxylates with various alcohols occurred in the presence of Candida rugosa lipase. This reaction allows an efficient preparation of unsymmetrical acetylenedicarboxylates and related α,β-acetylenic esters.
