In an article, author is Lauwick, Hortense, once mentioned the application of 501-36-0, Application In Synthesis of (E)-5-(4-Hydroxystyryl)benzene-1,3-diol, Name is (E)-5-(4-Hydroxystyryl)benzene-1,3-diol, molecular formula is C14H12O3, molecular weight is 228.2433, MDL number is MFCD00133799, category is indole-building-block. Now introduce a scientific discovery about this category.
Access to 3-Oxindoles from Allylic Alcohols and Indoles
The site-selective and regioselective allylation of 2-substituted indoles was performed by using a ruthenium(IV) precatalyst containing a phosphine-sulfonate chelate. Mono-, di-, and triallylated indoles were selectively obtained depending on the reaction conditions with the formation of water as the only byproduct. The preparation of 3-oxindole derivatives was then successfully performed owing to air oxidation of the corresponding allylated indoles. Diallylated pseudoindoxyls were proven to be good synthons to perform cyclization through a ring-closing metathesis reaction to afford the corresponding tricyclic adducts. The photophysical properties of the 3-oxindoles were measured, and some of the compounds showed strong fluorescence in water.
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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