Peter Schönholzer

TL;DR: In this paper, axially dissymmetric diphosphines (R)- and (S)-(6,6′-dimethoxybiphenyl-2,2′-diyl)bis(diphenymethylphosphine) ((R)-and(S)-5a; ‘MeO-BIPHEP’) and the analogues (R-and (S-5b and 5c) have been synthesized in enantiomerically pure form.

TL;DR: The axially dissymmetric diphosphines (−)-(R)- and (+)-(S)-(6-6′-dimethylbiphenyl-2,2′-diyl)bis(diphosphine) as mentioned in this paper have been synthesized and resolved into optically pure (R)-and (S)-enantiomers via complexation with di-μ-chlorob is {(R]-2-[1-(dimethylamino)ethyl]pheny-CN}dipalladium(II) ((R)-18)

TL;DR: A wide range of cyclic and open-chain alpa, alpha-disubstituted alpha-amino acids 1a-p were prepared and the absolute configurations of the alpha,alpha-disubsided amino acids were determined from X-ray structures of the diastereoisomers 20, 21g', 22d.

TL;DR: The crystal structure of 2-cyclohexylidene-2-fluoroacetic acid was reported in this article, using ab initio MO theory at the STO-3G level of approximation.

TL;DR: In this paper, the authors describe L-phenylalanine cyclohexylamide (5c) as a simple, cheap, and powerful chiral auxiliary for the synthesis of a series of optically pure α,α-disubstituted (R)- and (S)-amino acids of type 1.