109407-54-7Relevant academic research and scientific papers
Bi(I)-Catalyzed Transfer-Hydrogenation with Ammonia-Borane
Wang, Feng,Planas, Oriol,Cornella, Josep
, p. 4235 - 4240 (2019)
A catalytic transfer-hydrogenation utilizing a well-defined Bi(I) complex as catalyst and ammonia-borane as transfer agent has been developed. This transformation represents a unique example of low-valent pnictogen catalysis cycling between oxidation states I and III, and proved useful for the hydrogenation of azoarenes and the partial reduction of nitroarenes. Interestingly, the bismuthinidene catalyst performs well in the presence of low-valent transition-metal sensitive functional groups and presents orthogonal reactivity compared to analogous phosphorus-based catalysis. Mechanistic investigations suggest the intermediacy of an elusive bismuthine species, which is proposed to be responsible for the hydrogenation and the formation of hydrogen.
A concerted transfer hydrogenolysis: 1,3,2-diazaphospholene-catalyzed hydrogenation of Ni-34;N bond with ammonia-borane
Chong, Che Chang,Hirao, Hajime,Kinjo, Rei
supporting information, p. 3342 - 3346 (2014/04/03)
1,3,2-diazaphospholenes catalyze metal-free transfer hydrogenation of a Ni-34;N double bond using ammonia-borane under mild reaction conditions, thus allowing access to various hydrazine derivatives. Kinetic and computational studies revealed that the rate-determining step involves simultaneous breakage of the B-H and N-H bonds of ammonia-borane. The reaction is therefore viewed as a concerted type of hydrogenolysis. On the double: Diazaphospholenes catalyze the transfer hydrogenation of a Ni-34;N bond under mild reaction conditions, allowing access to various hydrazine derivatives. The catalytic cycle involves two key steps, and the catalyst maintains the PIII oxidation state throughout the catalytic cycle. The reaction mechanism involves a hydrogenolysis of the exocyclic P-N bond of the intermediate by ammonia-borane, and it proceeds in a concerted double-hydrogen-transfer fashion.
Synthesis and reaction of dimethyl 7-bromoindole-2,3-dicarboxylates
Miki, Yasuyoshi,Matsushita, Ko-Ichi,Hibino, Hajime,Shirokoshi, Hideaki
, p. 1585 - 1596 (2007/10/03)
Reaction of 1-(4-benzyloxyphenyl)-2-phenylhydrazine with dimethyl acetylenedicarboxylate (DMAD) gave dimethyl 5-benzyloxyindole-2,3- dicarboxylate and dimethyl indole-2,3-dicarboxylate. However, treatment of 1- (2-bromophenyl)-2-phenylhydrazine with DMAD
