691-24-7Relevant articles and documents
Cycloaddition reaction of tert-butyl isocyanate and a tellurium diimide dimer: Extended helical structure of the ureato telluroxide {[OC(μ-NBu(t))2TeO]2(thf)}∞
Schatte,Chivers,Jaska,Sandblom
, p. 1657 - 1658 (2000)
The reaction of Bu(t)NTe(μ-NBu(t))2TeNBu(t) with Bu(t)NCO in a 1:4 molar ratio in thf produces N,N'-bis(tert-butyl)ureato telluroxide dimers [OC(μ-NBu(t))2TeO]2, which form an extended helical network via weak >C=O···Te interactions.
Method of producing N,N'-ditertiary butyl dicarbodiimide by thiourea method
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Paragraph 0026-0040, (2019/03/08)
The invention belongs to the technical field of organic synthesis, and in particular relates to a method of producing N,N'-ditertiary butyl dicarbodiimide by a thiourea method. The method comprises the following steps: first, synthesizing N,N'-ditertiary butyl thiourea in a water medium by using tert-butylamine and carbon disulfide; carrying out suction filtration on the N,N'-ditertiary butyl thiourea, drying, carrying out primary oxidization, successively adding the mixture, caustic soda flakes, a solvent and a catalyst into a reaction kettle, heating the mixture to 60-65 DEG C, adding an oxidizing agent to react for 2 hours at 60-65 DEG C, leaving the product to stand for 20-25 minutes, and abandoning a lower water phase; carrying out secondary oxidizing reaction, dropwise adding quantitative oxidizing agent and catalyst, and carrying out a reaction for 1 hour at 65 DEG C; and adding alkali to neutralize, washing with water, separating a water layer, distilling the solvent out, and carrying out rectification at a reduced pressure to obtain N,N'-ditertiary butyl dicarbodiimide. The method of producing N,N'-ditertiary butyl dicarbodiimide by the thiourea method is mild in reactioncondition, high in yield, high in purity and simple in post-treatment, and process water can be recycled.
Synthesis of 2-aminobenzoxazoles and 3-aminobenzoxazines via palladium-catalyzed aerobic oxidation of o -aminophenols with isocyanides
Liu, Bifu,Yin, Meizhou,Gao, Hanling,Wu, Wanqing,Jiang, Huanfeng
supporting information, p. 3009 - 3020 (2013/06/26)
A Pd-catalyzed aerobic oxidation of o-aminophenols and isocyanides for the synthesis of 2-aminobenzoxazoles and 3-aminobenzoxazines has been achieved in an air atmosphere. The procedure constructs 2-aminobenzoxazoles and 3-aminobenzoxazines with moderate to excellent yields and a broad substrate scope. Apart from experimental simplicity, this methodology has the advantages of mild reaction conditions and easily accessible starting materials. Furthermore, the utility of this method has also been successfully applied to the synthesis of other types of useful nitrogen heterocycles.