The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 120-14-9, Name is Veratraldehyde, SMILES is C1=C(C=C(C(=C1)OC)OC)C=O, in an article , author is Usachev, Sergey A., once mentioned of 120-14-9, Quality Control of Veratraldehyde.
The addition of indoles to 4-methyl-2-trifluoromethyl-1,3-oxazin-6-one in an acidic medium proceeds at the C-2 atom and leads to 2-(indol-3-yl)-4-methyl-2-trifluoromethyl-2,3-dihydro-1,3-oxazin-6-ones in 67-83% yields. Pyrroles and N,N-dimethylaniline either do not enter into a reaction of this type or form the addition products in very low yields (6-12%).
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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