35305-48-7Relevant articles and documents
Preparation method of thiourea alkylation derivative
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Paragraph 0037-0044; 0058-0062, (2021/03/31)
The invention discloses a preparation method of a thiourea alkylation derivative, which comprises the following steps: stirring an aldehyde, N-arylthiourea, trichlorosilane and Lewis base in an organic solvent at a range of -10 DEG C to room temperature for reaction, and carrying out after-treatment to obtain the thiourea alkylation derivative, wherein the molar ratio of the aldehyde to the N-arylthiourea is 1:2 to 2:1, the molar ratio of the aldehyde to the Lewis base is 1:(0.01-0.20), the molar ratio of the aldehyde to trichlorosilane is 1:(1-2), R1 is a C1-C5 saturated alkyl group, or an unsubstituted or substituted aromatic ring, and R2 is H, an electron withdrawing substituent or an electron donating substituent. According to the method, trichlorosilane is catalyzed by the micromolecular Lewis base, reductive alkylation of thiourea is realized, synthesis can be realized by a one-pot method, and the method is simple to operate, short in reaction time, low in substrate toxicity, lowin cost, easy to obtain, mild in reaction condition and high in safety.
An isocyanide based multi-component reaction under catalyst- and solvent-free conditions for the synthesis of unsymmetrical thioureas
Singh, Karandeep,Sharma, Siddharth
, p. 197 - 201 (2016/12/28)
A new and efficient method for the synthesis of thiourea derivatives by a sequential one-pot, three-component reaction between aromatic isocyanides, amines, and 1,2-di-tert-butyldisulfane (DTBS) was developed and 27 different examples were synthesized in good to excellent yields. DTBS was identified as an effective sulfur surrogate without the use of both catalysts and solvents. This protocol does not employ any transition metal catalyst or special experimental setup.
Fluorous electrophilic scavengers for solution-phase parallel synthesis
Zhang, Wei,Chen, Christine Hiu-Tung,Nagashima, Tadamichi
, p. 2065 - 2068 (2007/10/03)
A fluorous isatoic anhydride and isocyanate are synthesized and used as scavengers for amines in solution-phase parallel synthesis of urea, thiourea, and β-hydroxyamine analogs. The resulting fluorous derivatives are readily separated from the reaction mi