68537-86-0Relevant academic research and scientific papers
Stable monovalent aluminum(i) in a reduced phosphomolybdate cluster as an active acid catalyst
Zhang, Ya-Qi,Zhou, Lai-Yun,Ma, Yuan-Yuan,Dastafkan, Kamran,Zhao, Chuan,Wang, Lan-Zhi,Han, Zhan-Gang
, p. 1886 - 1890 (2021)
Low-valent aluminum Al(i) chemistry has attracted extensive research interest due to its unique chemical and catalytic properties but is limited by its low stability. Herein, a hourglass phosphomolybdate cluster with a metal-center sandwiched by two benzene-like planar subunits and large steric-hindrance is used as a scaffold to stabilize low-valent Al(i) species. Two hybrid structures, (H3O)2(H2bpe)11[AlIII(H2O)2]3{[AlI(P4MoV6O31H6)2]3·7H2O (abbr. Al6{P4Mo6}6) and (H3O)3(H2bpe)3[AlI(P4MoV6O31H7)2]·3.5H2O (abbr. Al{P4Mo6}2) (bpe =trans-1,2-di-(4-pyridyl)-ethylene) were successfully synthesized with Al(i)-sandwiched polyoxoanionic clusters as the first inorganic-ferrocene analogues of a monovalent group 13 element with dual Lewis and Br?nsted acid sites. As dual-acid catalysts, these hourglass structures efficiently catalyze a solvent-free four-component domino reaction to synthesize 1,5-benzodiazepines. This work provides a new strategy to stabilize low-valent Al(i) species using a polyoxometalate scaffold.
A catalyst-free four-component domino reaction for the synthesis of functionalized 3-acyl-1,5-benzodiazepines
Sun, Yue-Wei,Bei, Yue-Ming,Wang, Lan-Zhi
, p. 930 - 938 (2019/01/30)
Various functional 3-acyl-1,5-benzodiazepines containing carboxyl, ester and acyl groups at the 2-position were synthesized via an efficient, sustainable and catalyst-free domino reaction. During the synthesis process, one new cycle and four new bonds (on
