New discoveries in chemical research and development in 2021. Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage. In a patent，Which mentioned a new discovery about Application In Synthesis of 2,3-Dihydrobenzo[b][1,4]dioxine-5-carboxylic acid, Application In Synthesis of 2,3-Dihydrobenzo[b][1,4]dioxine-5-carboxylic acid
Quinazoline and heterocyclic compound and its preparation method and application, which belongs to the field of pharmaceutical chemistry. The structural formula (I): Wherein R1 Said – H, – CH3 ; R2 Said First preparation 8, 10 – dichloro – 2, 3 – dihydro – [1, 4] dioxane [2, 3 – f] quinazoline (IX), Then R1 And R2 Substituted. The compounds of this invention can be used as a medicine for treating cancer of the phosphatidylinositol 3 – kinase (PI3K) inhibitors. (by machine translation)
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