75500-04-8Relevant academic research and scientific papers
Iridium-Catalyzed β-C(sp2)?H Borylation of Enamides – Access to 3,3-Dihalogeno-2-methoxypiperidines
Gillaizeau, Isabelle,Dondasse, Isma?l,Nicolas, Cyril,Mimoun, Liliane,Sukach, Volodymyr,Meudal, Hervé
supporting information, (2022/02/07)
An efficient catalytic preparation of synthetically useful new β-borylated enamides was achieved under relatively mild conditions via a regioselective iridium-catalyzed C(sp2)?H borylation. The method features broad substrate scope, good functi
A Unified Strategy for the Synthesis of Difluoromethyl- And Vinylfluoride-Containing Scaffolds
Duchemin, Nicolas,Buccafusca, Roberto,Daumas, Marc,Ferey, Vincent,Arseniyadis, Stellios
supporting information, p. 8205 - 8210 (2019/10/16)
Here, we report a general method for the synthesis of quaternary and tertiary difluoromethylated compounds and their vinylfluoride analogues. The strategy, which relies on a two-step sequence featuring a C-selective electrophilic difluoromethylation and either a palladium-catalyzed decarboxylative protonation or a Krapcho decarboxylation, is practical, scalable, and high yielding. Considering the generality of the method and the attractive properties offered by the difluoromethyl group, this approach provides a valuable tool for late-stage functionalization and drug development.
Ammonium formate/palladium on carbon: A versatile system for catalytic hydrogen transfer reductions of carbon-carbon double bonds
Paryzek, Zdzislaw,Koenig, Hanna,Tabaczka, Bartlomiej
, p. 2023 - 2026 (2007/10/03)
Various carbon-carbon double bonds in olefins and α,β -unsaturated ketones were effectively reduced to the corresponding alkanes and saturated ketones, using ammonium formate as a hydrogen transfer agent in the presence of Pd/C as catalyst in refluxing methanol.
Use of 1,3-dibenzyl-dihydrouracil in the chain extension of 2,3-O-isopropylidene-D-glyceraldehyde
Ulgheri, Fausta,Bacsa, John,Nassimbeni, Luigi,Spanu, Pietro
, p. 671 - 675 (2007/10/03)
The aldol-type addition of 1,3-dibenzyl-dihydrouracil 2 to 2,3-O-isopropylidene-D-glyceraldehyde 3 was examined in different solvents and under Lewis acid catalysis in order to establish the stereochemical preferences. A stereodivergent synthesis of 5-trihydroxypropyl-dihydrouracil derivatives 4 and its C-5 epimer 5 was realized. The synthesis of ureido polyols 8 and 10 was obtained via the reductive ring opening of the templates 4 and 5.
Studies on Uracil Derivatives and Analogues. Part 8. A Non-catalytic Method for the Conversion of Uracil Derivatives into Dihydrouracil Derivatives
Kundu, Nitya G.,Sikdar, Sikha,Hertzberg, Robert P.,Schmitz, Scott A.,Khatri, Surenda G.
, p. 1295 - 1300 (2007/10/02)
A mild and highly efficient method for the reduction of the 5,6-double bond of N-alkylated uracils with lithium tri-s-buthylborohydride gives the corresponding 5,6-dihydro derivatives.The method can also be used for alkylation of the 5-position of N-alkyluracils to give 5-alkyl-5,6-dihydrouracil derivatives.
A new synthesis of n-blocked dihydrouracil and dihydroorotic acid derivatives using lithium tri-sec-butyl borohydride as reducing agent
Hannon, Stephen J.,Kundu, Nitya G.,Hertzberg, Robert P.,Bhatt, Ram S.,Heidelberger, Charles
, p. 1105 - 1108 (2007/10/02)
1,3-Di-N-substituted uracil and its derivatives have been reduced with lithium-tri-sec-butyl borohydride to the corresponding 5,6-dihydro compounds in excellent yields. Alkylation of 5-position of uracil is also very conveniently accomplished.
