874955-58-5Relevant articles and documents
Enzymatic preparation of (1S,2R)- and (1R,2S)-stereoisomers of 2-halocycloalkanols
Kolodiazhna, Olga O.,Kolodiazhna, Anastasy O.,Kolodiazhnyi, Oleg I.
, p. 37 - 42 (2013/02/25)
The stereoisomers of cis-2-halocycloalkanols were resolved by a kinetically controlled transesterification with vinyl acetate in the presence of lipases in organic media. High enantioselectivities (ee >98%) and good isolated yields were obtained for all substrates using the appropriate lipase. Burkholderia cepacia lipase was the most efficient enzyme for the resolution of these substrates. The enantiomeric purities of the compounds were defined by derivatization with Mosher's acid and the absolute configurations were determined by chemical correlation.
Organocatalytic asymmetric α-bromination of aldehydes and ketones
Bertelsen, Soren,Halland, Nis,Bachmann, Stephan,Marigo, Mauro,Braunton, Alan,Jorgensen, Karl Anker
, p. 4821 - 4823 (2008/01/27)
The first organocatalytic enantioselective α-bromination of aldehydes and ketones is presented; a C2-symmetric diphenylpyrrolidine catalyst afforded the α-brominated aldehydes in good yields and up to 96% ee, while ketones were α-brominated by