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. Author manuscript; available in PMC: 2006 Jan 6.
Published in final edited form as: Org Lett. 2004 Jul 22;6(15):2519–2522. doi: 10.1021/ol0492851

Table 1.

Hydroamination of Diphenylacetylene with Aniline Using Tantalum Imido Complexes Inline graphic

entry [Ta] time (h) % yieldb
1 (PhCH2)3Ta==NCMe3, 1a 30 >95
2 [(PhCH2)Ta==NCMe3]+, 2 8 >95
3 Np3Ta==NCMe3, 1b 12 >95
4 (Et2N)3Ta==NCMe3 30 >95
5 Ta(NMe2)5 30 >95
6 Cl3Ta==NCMe3 30 NR
a

Identical results were obtained when the reaction was run in C6D6 or C7D8.

b

Yields are given as NMR yields.