3-Bromo-2-butanol stereoisomers

Stereoisomers that are not enantiomers are classified as diastereomers Each enantiomer of erythro 3 bromo 2 butanol is a diastereomer of each enantiomer of threo 3 bromo 2 butanol... 

Figure 7.3 summarizes our synthesis of all three stereoisomers of auxin-glutaric acid (167).3 Commercially available (.S )-2-methyl-l -butanol (A) and L-isoleucine (B) were converted to (.S)-3-mclhylpcntanoic acid (C), which was previously employed by Kogl and Erxleben to synthesize auxin-glutaric acid. Then, C was converted to bromo ester E, whose intramolecular cyclization to give 5-lactone F was the key step. Chromic-acid oxidation of F furnished a stereoisomeric mixture of auxin-glutaric acid (167). 

If a compound has more than one asymmetric carbon, the steps used to determine whether an asymmetric carbon has the i or the iS configuration must be applied to each of the asymmetric carbons individually. As an example, let s name one of the stereoisomers of 3-bromo-2-butanol. 

The four stereoisomers of 3-bromo-2-butanol are named as shown here. Take a few minutes to verify their names. 

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