54255-33-3

Upstream product

• 137-07-5 2-amino-benzenethiol 
• 762-42-5 dimethyl acetylenedicarboxylate 

Relevant academic research and scientific papers

Synthesis of Novel Dispiro 1,4-Benzothiazine Hybrid Heterocycles Through 1,3-Dipolar Cycloaddition

The 1,3-dipolar cycloaddition of azomethine ylides generated in situ from the reaction of acenaphthylene-1,2-dione or isatins and α-amino acids to (E)-methyl/ethyl 2-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]thiazin-2-ylidene)acetate led to the stereoselective f

Yield of benzothiazine derivatives and catalysis by heteropolyacids

An efficient heteropolyacid-catalyzed reaction for the synthesis of benzothiazine derivatives is reported. In this transformation, H3PW12O40 was employed as a catalyst in a reaction involving 2-aminobenzenethiols, acetylenic esters, and malonate esters. Optimum conditions are developed in i-PrOH at 50?C for 7 h.

On water: A practical and efficient synthesis of benzoheterocycle derivatives catalyzed by nanocrystalline copper(II) oxide

Recyclable CuO nanoparticles provide an efficient, economic, and novel method for the synthesis of quinoxaline, benzoxazine, and benzothiazine. This method provides a wide range of substrate applicability, avoids the use of organic solvents, and gives benzoheterocycles in satisfactory yields. Copyright Taylor & Francis Group, LLC.

Ultrasound-promoted greener synthesis of benzoheterocycle derivatives catalyzed by nanocrystalline copper(II) oxide

CuO nanoparticles provide an efficient, economic, and novel method for the synthesis of quinoxaline, benzoxazine, and benzothiazine under ultrasonic irradiation. The protocol offers advantages in terms of higher yields, short reaction times, and mild reaction conditions, with reusability of the catalyst.