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. 99-93-4, Name is 4′-Hydroxyacetophenone, molecular formula is C8H8O2. In an article, author is Basu, Pallabita,once mentioned of 99-93-4, Name: 4′-Hydroxyacetophenone.
Synthesis of tetrahydrothiopyrano[2,3-b]indoles via [3+3] annulation of nitroallylic acetates with indoline-2-thiones
An efficient one-pot method has been developed for the regio- and stereoselective synthesis of thiopyran annulated indoles. It involves a base mediated cascade [3+3] annulation of indoline-2-thiones and nitroallylic acetates. The tetrahydrothiopyranoindoles which were formed in good yields and in a short reaction time could be easily transformed to triazole derivatives by taking advantage of the nitro group present in the skeleton.
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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