112136-11-5Relevant academic research and scientific papers
Enantioselective, Catalytic Vicinal Difluorination of Alkenes
Scheidt, Felix,Sch?fer, Michael,Sarie, Jér?me C.,Daniliuc, Constantin G.,Molloy, John J.,Gilmour, Ryan
supporting information, p. 16431 - 16435 (2018/11/23)
The enantioselective, catalytic vicinal difluorination of alkenes is reported by II/IIII catalysis using a novel, C2-symmetric resorcinol derivative. Catalyst turnover via in situ generation of an ArIIIIF2 species is enabled by Selectfluor oxidation and addition of an inexpensive HF–amine complex. The HF:amine ratio employed in this process provides a handle for regioselective orthogonality as a function of Br?nsted acidity. Selectivity reversal from the 1,1-difluorination pathway (geminal) to the desired 1,2-difluorination (vicinal) is disclosed (>20:1 in both directions). Validation with electron deficient styrenes facilitates generation of chiral bioisosteres of the venerable CF3 unit that is pervasive in drug discovery (20 examples, up to 94:06 e.r.). An achiral variant of the reaction is also presented using p-TolI (up to >95 % yield).
A chemoselective oxidation of monosubstituted ethylene glycol: Facile synthesis of optically active α-hydroxy acids
Chinthapally, Kiran,Baskaran, Sundarababu
, p. 4305 - 4309 (2014/06/23)
A mild and efficient method for the synthesis of optically active α-hydroxy acids through chemoselective oxidation of monosubstituted ethylene glycols using the TEMPO-NaOCl reagent system is described. It is evident from our studies that the solvent, pH and reaction temperature are very crucial for the success of this oxidation. The versatility of this method has been demonstrated with a variety of aliphatic, aromatic and carbohydrate substrates bearing various functional groups. the Partner Organisations 2014.
A HIGHLY STEREOSELECTIVE CONVERSION OF α,β-EPOXY ESTERS TO α-HYDROXY ESTERS. AN EFFICIENT ROUTE TO OPTICALLY ACTIVE α-HYDROXYESTERS
Otsubo, Kenji,Inanaga, Junji,Yamaguchi, Masaru
, p. 4435 - 4436 (2007/10/02)
α,β-Epoxy esters were cleanly converted to α-hydroxy esters with retention of the configurations at the α-carbon atoms via MgI2-promoted regioselective oxirane ring-opening followed by tributyltin hydride-reduction.
