The strong directing ability of the N,N,N',N'-tetramethyldiaminophosphorodiamidate group has been used to achieve selective metalations on various heterocycles such as pyridines, quinolines and quinoxalines with TMP-derived bases like TMPMgCl x LiCl, TMP(2)Mg x 2 LiCl, and TMP(2)Zn x 2 MgCl(2) x 2 LiCl. This protocol was applied in the synthesis of etoricoxib, talnetant and a P-selectin inhibitor.
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Phosphorodiamidate-directed metalation of N-heterocycles using Mg- and Zn-TMP bases.
Org Lett
May 2010
Department Chemie, Ludwig-Maximilans Universität München, Butenandtstr. 5-13, 81377 München, Germany.
The strong directing ability of the N,N,N',N'-tetramethyldiaminophosphorodiamidate group has been used to achieve selective metalations on various heterocycles such as pyridines, quinolines and quinoxalines with TMP-derived bases like TMPMgCl x LiCl, TMP(2)Mg x 2 LiCl, and TMP(2)Zn x 2 MgCl(2) x 2 LiCl. This protocol was applied in the synthesis of etoricoxib, talnetant and a P-selectin inhibitor.
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