41720-99-4Relevant academic research and scientific papers
Enantioselective alkene radical cations reactions
Crich, David,Shirai, Michio,Brebion, Franck,Rumthao, Sochanchingwung
, p. 6501 - 6518 (2007/10/03)
The reaction of enantiomerically enriched 2-methyl-2-nitro-3-(diphenylphosphatoxy)alkyl radicals with tributyltin hydride and AIBN in benzene at reflux results in the formation of alkene radical cation/anion pairs, which are trapped intramolecularly by am
Enantioselective cyclization of alkene radical cations
Crich, David,Shirai, Michio,Rumthao, Sochanchingwung
, p. 3767 - 3769 (2007/10/03)
(Matrix Presented) Enantiomerically enriched β-(diphenylphosphatoxy) nitroalkanes undergo radical ionic fragmentation, induced by tributyltin hydride and AIBN in benzene at reflux, to give alkene radical cations in contact radical ion pairs. These contact
A simple stereoselective synthesis of enantiopure 2-substituted pyrrolidines and piperidines from chiral (R)-phenylglycinol-derived bicyclic 1,3-oxazolidines
Andres, Jose M.,Herraiz-Sierra, Ignacio,Pedrosa, Rafael,Perez-Encabo, Alfonso
, p. 1719 - 1726 (2007/10/03)
Chiral, nonracemic 2-substituted pyrrolidines and piperidines were prepared in high ee and moderate to good chemical yields in three steps from (R)-phenylglycinol and γ- or δ-chloroketones. The key step of the synthesis was the stereo- selective reductive ring-opening of chiral bicyclic 1,3- oxazolidines prepared by condensation of (R)-phenylglycinol and the corresponding ketones.
LARGE SCALE PREPARATION OF VERSATILE CHIRAL AUXILIARIES DERIVED FROM (S)-PROLINE
Enders, Dieter,Kipphardt, Helmut,Gerdes, Peter,Brena-Valle, Leonardo J.,Bhushan, Vidya
, p. 691 - 704 (2007/10/02)
The synthesis of a variety of enantiomerically pure chiral auxiliaries based on (S)-proline and bearing sterically demanding side chains at the pyrrolidine moiety, such as the secondary amines (S)-3,5 and 7 and the hydrazines (S)-6, is described on a molar scale.As key step, the Grignard or RLi addition to the N-benzylated proline ester (S)-1 is used.
