1013031-65-6Relevant articles and documents
Preparation process 2-6 - dibromobenzoyl chloride
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, (2021/01/24)
The invention discloses a preparation process for 2,6-dibromobenzene methylsulfonyl chloride. The preparation process comprises the following steps: with m-dibromobenzene as a starting raw material, subjecting the m-dibromobenzene to a five-step reaction of acylation, reduction, chlorine substitution, substitution and sulfonyl chlorination so as to obtain a target compound namely the 2,6-dibromobenzene methylsulfonyl chloride. The process provided by the invention uses cheap and easily-available raw materials, has good safety by using NCS to replace chlorine gas as a chlorinating agent, and facilitates practical application.
Mono- and Di-Mesoionic Carbene-Boranes: Synthesis, Structures and Utility as Reducing Agents
Stein, Felix,Kirsch, Marius,Beerhues, Julia,Albold, Uta,Sarkar, Biprajit
supporting information, p. 2417 - 2424 (2021/06/17)
Mesoionic carbenes (MIC) of the 1,2,3-triazol-5-ylidene type are currently popular ligands in organometallic chemistry. Their use in main group chemistry has been rather limited. In this contribution we present mono- and di-MIC-boranes with MICs based on triazolylidenes. The synthesis involves in-situ deprotonation of the corresponding triazolium salts and their reaction with boranes to form the desired compounds. Whereas this reaction route worked well for all triazolium salts derived from the 1,4-regioisomer of the triazoles, for the methlyene-bridged bi-triazolium salt derived from a 1,5-substiuted triazole, we observed the unexpected decomposition of the bi-triazolium and the formation of a triazole-borane with a new N?B bond. All compounds were characterized via multinuclear NMR spectroscopy, mass spectrometry, and single crystal X-ray diffraction. Furthermore, the MIC-boranes were used as reducing agents for the reduction of the C=O of aldehydes to the corresponding alcohols.
Chiral Sulfide Catalysis for Desymmetrizing Enantioselective Chlorination
Cao, Qingxiang,Luo, Jie,Zhao, Xiaodan
supporting information, p. 1315 - 1319 (2019/01/14)
An unprecendented chiral sulfide catalyzed desymmetrizing enantioselective chlorination is disclosed. Various aryl-tethered diolefins and diaryl-tethered olefins afforded teralins and tricyclic hexahydrophenalene derivatives, respectively, bearing multiple stereogenic centers in high yields with excellent enantio- and diastereoselectivities. In contrast, the tertiary amine catalyst (DHQD)2PHAL led to a diastereomeric product. The products could be transformed into a variety of compounds, such as spiro-N-heterocycles.