Scalable Synthesis and Isolation of the Four Stereoisomers of Methyl 1-Amino-3-(4-bromophenyl)cyclopentanecarboxylate, Useful Intermediates for the Synthesis of S1P1 Receptor Agonists
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The individual isomers of methyl 1-amino-3-(4-bromophenyl)cyclopentanecarboxylate are useful intermediates for the synthesis of S1P1 receptor agonists. Herein we describe a scalable synthesis and isolation of each of the four stereoisomers of this compound in gram quantities with >98% ee and de. The utility of this approach is demonstrated by the synthesis of ((1R,3R)-1-amino-3-(4-octylphenyl)cyclopentyl)methanol in 7 steps, 11% overall yield, and >98% ee and de.
创建时间：
2016-02-26
