One-Pot Synthesis of N,N-Diphenyl-2-benzothiazolamines from 1-(2-Iodophenyl)-3-phenylthioureas and Iodobenzenes

Copper-Catalyzed One-Pot Synthesis of N,N-4-Triphenylthiazol-2-amines

Herein, we reported an efficient copper-catalyzed strategy for the synthesis of N,N-4-triphenylthiazol-2-amines from bromoacetophenone, phenylthiourea and iodobenzene. This method features good functional group tolerance, easy availability of starting materials and simplicity of operation, which provides an alternative method for the synthesis of 2-aminothiazoles.

One Pot Synthesis of C3-Sulfurized Imidazolo [1,2-a] Pyridines

A facile and efficient annulation strategy was developed from easily accessible a-bromoketones, aminopyridines and benzazol, which afforded a series of imidazole [1,2-a]pyridine sulfides in moderate to good yields. The reaction involves the formation of C-N/C-S bond with the advantages of easy operation and wide substrates scope.

Synthesis of 1-Benzyl-2,4-diarylimidazole through I2/CuI-Catalyzed Cyclization of Benzylamine and Hydrazone

In this paper, we report an innovative method for synthesizing 1-benzyl-2,4-diarylimidazole utilizing 1-phenylethanone-2-(2-pyridinyl) hydrazine and benzylamine, catalyzed by an I2/CuI system. This approach represents a significant departure from traditional methods for synthesizing polysubstituted imidazoles; it employs the I2/CuI catalyst to replace rare metal catalysts, thereby achieving high yields of substitution products (≤85%). This method for the generation of 1,2,4-triimidazole derivatives is characterized by its exceptional chemical selectivity and extensive substrate compatibility.

Thiourea as Bifunctional Hydrogen Bond Donor and Brønsted Base Catalyst for Green One-Pot Synthesis of 2-Aryl/Heteroaryl/Styryl Benzothiazoles in the Aqueous Medium under Ultrasound Irradiation

A green organocatalysis cascade strategy using thiourea in catalytic amounts as both a hydrogen bond donor and a Brønsted base bifunctional catalyst was utilized to synthesize a series of 2-aryl/heteroaryl/styryl benzothiazole derivatives. This strategy involved an ultrasound-irradiated one-pot two-component reaction between substituted aldehydes and 2-amino thiophenols in an aqueous medium at 60 °C, using air as an oxidant. At the gram-scale, this protocol yielded 87% of the desired product, making it suitable for production at a larger scale. This green and mild protocol offers excellent yields, cost-effectiveness, atom economy, step economy, and a simple operation that does not require extra purification steps. Furthermore, the catalyst is easily recoverable and can be used for up to five cycles without a significant loss of any activity.