Tetrahedron Letters p. 6419 - 6422 (1995)
Update date:2022-09-26
Topics:
Rossen
Weissman, Steven A.
Sager
Reamer
Askin
Volante
Reider
Hydrogenation of tetrahydropyrazine 4g with [(R)-BINAP(COD)Rh]TfO gave piperazine 6g in 96% yield and 99% ee. Simple hydrogenolytic deprotection and crystallization afforded the key chiral (S)-N-Boc-piperazine MK-639 intermediate I in high yield and enant
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