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2 Open Chemistry

2 2008

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Palladium(0)-catalyzed amination of allylic natural terpenic functionalized olefins

100%

Houssame S. , Anane H. , Firdoussi L. , Karim A.

Open Chemistry

2008

tom 6

nr 3

470-476

The palladium(0) catalyzed amination of allylic acetates and carbonates derivatives from terpenic olefins was carried out under mild conditions. The reaction offers a very good method for the preparation of allylic amines and thus to provide a useful entry to new functionalized terpenic olefin products. The mechanism involving a formation of p-allyl-palladium intermediate complex is in good agreement with the results obtained with the optically active substrates, as well as via an analysis of the observed regio-and stereoselectivity. [...]

A G2(MP2) theoretical study of substituent effects on H3BNHnCl3−n (n= 3-0) donor-acceptor complexes

63%

Anane H. , Houssame S. , Guerraze A. , Guermoune A. , Boutalib A. , Jarid A. , Nebot-Gil I. , Tomás F.

Open Chemistry

2008

tom 6

nr 3

400-403

The complexation energies of H3BNHnCl3−n (n= 3-0) complexes and the proton affinities of NHnCl3−n compounds have been computed at the G2(MP2) level of theory. G2(MP2) results show that the successive chlorine substitution on the ammonia decreases both the basicity of the NHnCl3−n ligands and the stability of H3BNHnCl3−n complexes. The findings are interpreted in terms of the rehybridisation of the nitrogen lone-pair orbital. The NBO partitioning scheme shows that the variation of the N-H and N-Cl bond lengths, upon complexation, is due to variation of “s” character in these bonds. [...]