905451-15-2Relevant academic research and scientific papers
Ti-amide catalyzed synthesis of cyclic guanidines from di-/triamines and carbodiimides
Shen, Hao,Wang, Yang,Xie, Zuowei
scheme or table, p. 4562 - 4565 (2011/10/12)
A titanacarborane monoamide catalyzed, one-step synthesis of mono/bicyclic guanidines from commercially available di/triamines and carbodiimides is reported. The reaction mechanism is also proposed.
Titanacarborane mediated C-N bond forming/breaking reactions
Shen, Hao,Xie, Zuowei
scheme or table, p. 1652 - 1657 (2009/10/11)
Constrained-geometry titanacarboranes [σ:η1:η5-(OCH2)(R2NCH2)C2B9H9]Ti(NR2) (R = Me, Et) are synthesized via an unexpected reaction of [Me3NH][μ-7,8-CH2OCH2-7,8-C2B9H10] with Ti(NR2)4 (R = Me, Et), involving a C-O bond cleavage and C-N bond formation. These complexes can be readily converted to new amide species or alkoxide by reacting with amines or esters, respectively. Insertion of a series of unsaturated molecules into the Ti-N bond of the aforementioned complexes results in the formation of various half-sandwich titanacarboranes. [σ:η1:η5-(OCH2)(Me2NCH2)C2B9H9]Ti(NMe2) is also able to efficiently catalyze the hydroamination of carbodiimides and the transamination of guanidines. These results are summarized in this brief account.
