1903. (h) Xiao, Y.; Zhang, J. Adv. Synth. Catal. 2009, 351, 617. (i) Ma, S.; Zhang, J. Chem. Commun. 2000, 117; (j) Hashmi, A. S. K.; Schwarz, L.; Choi, J. H.; Frost, T. M. Angew. Chem., Int. Ed. 2000, 39, 2285; (k) Sromek, A. W.; KelJin, A. V.; Gevorgyan, V. Angew. Chem., Int. Ed. 2004, 43, 2280. 6. Yao, T.; Zhang, X.; Larock, R. C. J. Am. Chem. Soc. 2004, 126, 11164. (b) Patil, N. T.; Wu, H.; Yamamoto, Y. J. Org. Chem. 2005, 70, 4531. (c) Yao, T.; Zhang, X.; Larock, R. C. J. Org. Chem. 2005, 70, 7679. (d) Oh, C.; Reddy, V.; Kim, A.; Rhim, C. Tetrahedron Lett. 2006, 47, 5307. (e) Liu, X.; Pan, Z.; Shu, X.; Duan, X.; Liang, Y. Synlett 2006, 1962. 7. Chen, W. L.; Su, C. L.; Huang, X. Synlett , 2006 , 1446 . (b) Chen, W.; Huang, X.; Zhou, H.; Ren, L. Synthesis 2006, 609. (c) Huang, X.; Zhou, H.; Chen, W. J. Org. Chem. 2004, 69, 839. (d) Huang, X.; Chen, W. L.; Zhou, H. W. Synlett 2004, 329. 8. Chinchilla, R.; Najera, C.; Yus, M. Chem. Rev. 2004, 104, 2667. (b) Tanabe, Y.; Wakimura, K.; Nishii, Y.; Muroya, Y. Synthesis 1996, 388. (c) Hooper, M. W.; Utsunomiya, M.; Hartwig, J. F. J. Org. Chem. 2003, 68, 2861. (d) Padwa, A.; Crawford, K. R.; Rashatasakhon, P.; Rose, M. J. Org. Chem. 2003, 68, 2609. (e) Crawford, K. R.; Padwa, A. Tetrahedron Lett. 2002, 43, 7365. 9. The yields were obtained from 1 H NMR of crude product with quantitative CH 2 Br 2 by comparing the peak area between 5.57ppm of pyrrole and 4.94ppm of CH 2 Br 2 . F or selected papers, please see: (a) Xiao, Y.; Zhang, J. Angew. Chem., Int. Ed. 2008, 47, 1903. (b) Yu, F.; Lian, X.; Ma, S. Org. Lett. 2007, 9, 1703. 10. At present, the true reason is not clear. It may be the formation of the more stable silver - amine complex because of its strong complexible ability of aliphatic amine and leading to the inactivation of catalyst . 11. This may due to the sterically hindered of the substrate between aldehyde and ketone. The condensation reaction between aldehyde and arylamine affords the imine is more faster.
