The first highly stereoselective approach to the mitotic kinesin Eg5 inhibitor HR22C16 and its analogues

Add time:07/13/2019    Source:sciencedirect.com

A general method for the synthesis of the mitotic kinesin Eg5 inhibitor HR22C16 1 and its analogues based on protecting group (PG)-modulated highly diastereoselective Pictet–Spengler reaction of l-tryptophan methyl ester hydrochloride with meta-(RO)-benzaldehyde is described. By using the enantiomerically pure (1R,3S)-1,3-disubstituted tetrahydro-β-carboline trans-4c as a common chiral synthon, HR22C16 1 and its analogues 2 and 3 were synthesized in 90.1%, 90.2%, and 86.5% overall yields, respectively.

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