In an article, author is Pradhan, Tapas R., once mentioned the application of 209216-23-9, Product Details of 209216-23-9, Name is Entecavir Monohydrate, molecular formula is C12H17N5O4, molecular weight is 295.2945, MDL number is MFCD09754448, category is indole-building-block. Now introduce a scientific discovery about this category.
Reported is the utilization of electronically biased conjugated alkynes in the development of highly diastereo- and regioselective dearomative [2 + 2] cycloadditions, alkenylations, and ring expansions of electron-rich indoles. Regioselective protonations of cross- and linear-conjugated alkynes were found to be crucial for accessing various cyclobutene-fused indoline and alkenylated indole derivatives. Furthermore, the facile ring expansion of [2 + 2] keto adducts, which were successfully synthesized from ynones, provided 1H-benzo[b]azepine scaffolds.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles