期刊
ORGANIC PROCESS RESEARCH & DEVELOPMENT
卷 18, 期 11, 页码 1345-1353出版社
AMER CHEMICAL SOC
DOI: 10.1021/op500074h
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An efficient multistep method for the continuous flow synthesis of thieno[2,3-c]isoquinolin-5(4H)-one-A (TIQ-A), an important pharmacological tool and building block for PARP-1 inhibitors, has been developed. The synthesis involves a Suzuki coupling reaction to generate 3-phenylthiophene-2-carboxylic acid which is transformed into the corresponding acyl azide and readily cyclized by a thermal Curtius rearrangement. A statistical design of experiments (DoE) was employed as a valuable support for decision-making of further experiments enabling the development of a robust and reliable protocol for large-scale preparation. As a result, the reactions are facile, safe, and easy to scale-up. The large-scale applicability of this improved flow method was tested by conducting the reactions on multigram scale to produce the desired product in high yield and quality for biopharmacological appraisals.
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