Synthesis of 2-Substituted Piperazines via Direct α-Lithiation

Autor: Martin Berkheij, Dennis J. den Boer, Claudia Sewing, Jan H. van Maarseveen, Wouter I. Iwema Bakker, Jan Willem Terpstra, Lisan van der Sluis, Henk Hiemstra, Adri van den Hoogenband
Přispěvatelé: Synthetic Organic Chemistry (HIMS, FNWI)
Rok vydání: 2005
Předmět:
Zdroj: Tetrahedron Letters, 46(14), 2369-2371. Elsevier
ISSN: 1522-2667
0931-7597
0040-4039
DOI: 10.1002/chin.200530146
Popis: A novel efficient synthetic route towards the pharmaceutically relevant 2-substituted piperazine class is described. The key step involves α-lithiation of N-Boc piperazines, followed by reaction with several electrophiles. To obtain high yields, in some cases transmetallation to copper after the lithiation step is required.
Databáze: OpenAIRE