12082-52-9Relevant academic research and scientific papers
Iron(III)-catalyzed aerobic oxidation for the synthesis of 1-benzoxazolyl-o-carboranes
Cao, Ke,Li, Bo,Wen, Xin-Yu,Wu, Ji,Yang, Junxiao,Zhang, Cai-Yan
, (2021)
A FeCl3 catalyzed tandem condensation/cyclization/aerobic oxidation process for synthesis of 1-benzoxazolyl-o-carboranes has been developed. The degradation of o-carborane in the presence of aza-/oxa-nucleophiles was completely suppressed, and a series of 1-benzoxazolyl-o-carboranes, 1-benzothiazolyl-o-carborane and 1-benzimidazolyl-o-carborane have been synthesized with good to excellent yields. This work offers a general protocol for synthesis of 1-benzoxazolyl-o-carboranes, which has important reference for synthesis of aromatic heterocycle-carborane derivatives and promote its applications in miscellaneous areas.
Selective Catalytic B-H Arylation of o-Carboranyl Aldehydes by a Transient Directing Strategy
Zhang, Xiaolei,Zheng, Hongning,Li, Jie,Xu, Fei,Zhao, Jing,Yan, Hong
supporting information, p. 14511 - 14517 (2017/10/24)
Carboranyl aldehydes are among the most useful synthons in derivatization of carboranes. However, compared to the utilization of carboranyl carboxylic acids in selective B-H bond functionalizations, the synthetic application of carboranyl aldehydes is limited due to the weakly coordinating nature of the aldehyde group. Herein, the direct arylation of o-carboranyl aldehydes has been developed via Pd-catalyzed cage B-H bond functionalization. With the help of glycine to generate a directing group (DG) in situ, a series of cage B(4,5)-diarylated- and B(4)-monoarylated-o-carboranyl aldehydes were obtained in good to excellent yields with high selectivity. A wide range of functional groups are tolerated. The aldehyde group in the B-H arylated products could be readily removed or transformed into o-carboranyl methanol. A plausible catalytic cycle for B-H arylation was proposed based on control experiments and stoichiometric reactions, including the isolation of a key bicyclic palladium complex.
Reactions of Lithium and Magnesium Derivatives of o-Carboranes with Carbonyl Compounds
Kazantsev,Butyaikin,Kazantsev,Otrashchenkov
, p. 83 - 86 (2007/10/03)
Reactions of lithium and magnesium derivatives of o-carboranes with methyl formate, ethyl formate, dimethylformamide, and some other compounds containing a formyl group were studied. Some regular trends and specific features of these reactions were revealed.
