摘要
This paper reports the reactions of a monomeric aluminum dihydride LAlH2(L = HC[C(Me)N(Ar)]2,Ar = 2,6-i-Pr2C6H3) with diazo,azido,and terminal alkyne compounds.The reaction of LAlH2 with N2CH(SiMe3) and N3(1-Ad) occurred through an Al-H addition to end-on nitrogen to yield respective compounds LAl[N(H)N = CH(SiMe3)]2(1) and LAl[N(H)N=N(1-Ad)]2(2),while the reaction of LAlH2 with PhC≡CH occurred through a stepwise deprotonation to yield LAlH(C≡CPh)(5) and LAl-(C≡CPh)2(6),respectively.2 further reacted by N2-release to yield LAl[NH(1-Ad)][N(H)N=N(1-Ad)](3) and LAl[NH-(1-Ad)]2(4) upon the increased temperature treatment.Compounds 1-6 have been fully characterized,revealing novel reactivity patterns of LAlH2 toward different substrates under the steric influence from the bulky L ligand at Al.
This paper reports the reactions of a monomeric aluminum dihydride LAlH2(L = HC[C(Me)N(Ar)]2,Ar = 2,6-i-Pr2C6H3) with diazo,azido,and terminal alkyne compounds.The reaction of LAlH2 with N2CH(SiMe3) and N3(1-Ad) occurred through an Al-H addition to end-on nitrogen to yield respective compounds LAl[N(H)N = CH(SiMe3)]2(1) and LAl[N(H)N=N(1-Ad)]2(2),while the reaction of LAlH2 with PhC≡CH occurred through a stepwise deprotonation to yield LAlH(C≡CPh)(5) and LAl-(C≡CPh)2(6),respectively.2 further reacted by N2-release to yield LAl[NH(1-Ad)][N(H)N=N(1-Ad)](3) and LAl[NH-(1-Ad)]2(4) upon the increased temperature treatment.Compounds 1-6 have been fully characterized,revealing novel reactivity patterns of LAlH2 toward different substrates under the steric influence from the bulky L ligand at Al.
基金
supported by the National Natural Science Foundation of China (20842006, 20972129, and 20902112)
China Postdoctoral Science Foundation (20090460748)
the Fund for New Teacher of Higher Education (200803841012)
the Project Sponsored by SRF for ROCS, SEM (2009060011500466)
