The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 3895-92-9, Name is Chelerythrine Chloride, SMILES is C[N+]1=CC2=C(OC)C(OC)=CC=C2C3=C1C4=CC5=C(OCO5)C=C4C=C3.[Cl-], in an article , author is Sakamoto, Kenta, once mentioned of 3895-92-9, HPLC of Formula: https://www.ambeed.com/products/3895-92-9.html.
Bronsted Acid-Catalyzed Cyclopropanation of Indoles Using alpha-Aryl-alpha-diazoacetates
Metal-free cyclopropanation of N-protected indoles with alpha-aryl-alpha-diazoacetates proceeded by using a catalytic amount of triflic imide as a Bronsted acid catalyst. The use of a catalytic amount of methyl phenylacetate improved the efficiency of the Bronsted acid-catalyzed cyclopropanation. A reaction mechanism including C-protonation of diazoacetates with HNTf2, followed by formal [3+2] cycloaddition with indoles and 1,3-rearrangement was proposed for the cyclopropanation.
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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