Asymmetric synthesis often relies on the use of chiral building blocks. These building blocks can be either purchased or synthesized through asymmetric reactions. Chiral auxiliaries or chiral catalysts can be employed to introduce asymmetry at various stages.
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(S)-tert-butyl 2-amino-3-(2-bromo-5-hydroxyphenyl)propanoate
1,6-anhydro-2-deoxy-3-O-benzyl-2-C-methyl-β-D-altropyranose
(4R,5R)-5-(2-benzyloxyethyl)-4-hydroxydihydrofuran-2-one
(R)-(Z)-1-Benzyloxy-2-hydroxy-3-pentene
