99334-20-0Relevant articles and documents
Dynamic kinetic asymmetric transformations of β-halo-α-keto esters by N,N′-dioxide/Ni(II)-catalyzed carbonyl-ene reaction
Liu, Wen,Cao, Weidi,Hu, Haipeng,Lin, Lili,Feng, Xiaoming
supporting information, p. 8901 - 8904 (2018/08/17)
Dynamic kinetic asymmetric transformations of racemic β-halo-α-keto esters through carbonyl-ene reaction were realized using a chiral N,N′-dioxide-nickel(ii) complex, giving the corresponding β-halo-α-hydroxy esters containing two vicinal chiral tri- and tetrasubstituted carbon centers in good yields and dr with excellent ee values without the use of extra bases. Meanwhile, a proposed reaction mechanism was presented according to the configuration of the product.
Enantiopure trans -3-arylaziridine-2-carboxamides: Preparation by bacterial hydrolysis and ring-openings toward enantiopure, unnatural D -α-amino acids
Moran-Ramallal, Roberto,Liz, Ramon,Gotor, Vicente
supporting information; experimental part, p. 6614 - 6624 (2010/11/17)
Several racemic trans-3-arylaziridine-2-carboxamides were prepared and then resolved by Rhodococcus rhodochrous IFO 15564-catalyzed hydrolysis. The resulting enantiopure (2R,3S)-3-arylaziridine-2-carboxamides are adequate substrates to undergo fully stereoselective nucleophilic ring-openings at the C-3 ring position to finally yield enantiopure, unnatural d-α- aminocarboxylic acids. Experimental evidence is provided that suggests the fate of the (2S,3R)-3-arylaziridine-2-carboxylic acids concomitantly formed during the resolution processes. In this context, the similar bacterial resolution of racemic 1-arylaziridine-2-carboxamides and -carbonitriles, previously investigated by our research group, has been partially re-examined.
An improved procedure for the epoxidation of methyl cinnamate derivatives and production of acid sensitive epoxides
Moyna, Guillermo,Williams, Howard J.,Scott
, p. 2235 - 2239 (2007/10/03)
By using a biphasic epoxidation system, unreactive methyl cinnamate derivatives were epoxidized at higher rates, and epoxides that decomposed in the presence of m-chlorobenzoic acid (mCBA) to diol ester opening products under standard conditions were obtained in fair to excellent yields.