A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 490-91-5, Name is Thymoquinone, molecular formula is C10H12O2. In an article, author is Jafari, Behzad,once mentioned of 490-91-5, Name: Thymoquinone.
Hitherto unknown thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles were synthesized for the first time by base-mediated cyclo-condensation, bromination, and subsequent cyclization by two-fold Buchwald-Hartwig reactions.
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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