6500-30-7Relevant academic research and scientific papers
Pd-Colloids-Catalyzed/Ag2O-Oxidized General and Selective Esterification of Benzylic Alcohols
Sable, Vaibhav,Shah, Jagrut,Sharma, Anuja,Kapdi, Anant R.
supporting information, p. 2639 - 2647 (2019/07/08)
Palladium colloids obtained from the degradation of Hermann–Beller palladacycle proved to be an efficient catalytic system in combination with silver oxide as a selective oxidant for the oxidative esterification of differently substituted benzyl alcohols in MeOH as solvent. Excellent reactivity exhibited by the catalytic system also allowed the alcoholic coupling partner to be changed from MeOH to a wide range of alcohols having diverse functionalities. The mildness of the developed protocol also made it possible to employ propargyl alcohol as the coupling partner without any observation of any interference of the terminal alkyne. Selective oxidative coupling of a primary alcoholic functional group over secondary in the case of glycols and glycerols was also made possible using the developed catalyst system. To test the relevancy of Pd/Ag combined catalysis mixed Pd/Ag colloids were synthesized, characterized by TEM, XRD and XPS and applied to oxidative-esterification successfully.
Development of a redox-free Mitsunobu reaction exploiting phosphine oxides as precursors to dioxyphosphoranes
Tang, Xiaoping,Chapman, Charlotte,Whiting, Matthew,Denton, Ross
supporting information, p. 7340 - 7343 (2014/07/07)
The development of the first redox-free protocol for the Mitsunobu reaction is described. This has been achieved by exploiting triphenylphosphine oxide-the unwanted by-product in the conventional Mitsunobu reaction-as the precursor to the active P(v) coupling reagent. Multinuclear NMR studies are consistent with hydroxyl activation via an alkoxyphosphonium salt.
Synthesis of poly(3-alkylthiophene)-block-poly(arylisocyanide): Two sequential, mechanistically distinct polymerizations using a single catalyst
Wu, Zong-Quan,Ono, Robert J.,Chen, Zheng,Bielawski, Christopher W.
supporting information; experimental part, p. 14000 - 14001 (2011/01/11)
Block copolymers of poly(3-hexylthiophene) and a poly(arylisocyanide) were synthesized in a single pot via the addition of 2-bromo-3-hexyl-5- chloromagnesiothiophene followed by n-decyl 4-isocyanobenzoate to a solution of Ni(1,3-bis(diphenylphosphino)prop
Smectogenic Salts Formed by Combination of Alkyl p-Aminobenzoates and p-Ethyl- or p-Chlorobenzenesulfonic Acid
Matsunaga, Y.,Sakamoto S.,Togashi, A.,Tsujimoto, M.
, p. 161 - 166 (2007/10/02)
Two series of smectogenic salts were obtained by combining alkyl p-aminobenzoates with p-ethyl- and p-chlorobenzenesulfonic acids, respectively.The shortest ester alkyl chain required to generate a smectic A phase is nonyl when the former sulfonic acid is employed but the chain may be as short as butyl when the latter is employed.The smectic A-isotropic transition temperature in the second series is significantly higher than that in the first series, indicating that the terminal substituent on the anion is as crucial as that in non-ionic mesogens in determining the mesophase stability. - Keywords: Smectic, alkyl p-aminobenzoates, benzenesulfonates
NEW OXIDATIVE ESTERIFICATION OF ALCOHOLS WITH ALDEHYDES BY THE Br2-HMPT-NaHCO3.
Al Neirabeyeh, Mamdouh,Pujol, M. Dolors
, p. 2273 - 2276 (2007/10/02)
A new aldehyde-mediated oxidative esterification using a bromine/HMPT complex in the presence of sodium hydrogen carbonate is described.
