Archives for Chemistry Experiments of 4-Chloroindole-3-carbaldehyde

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Process for the preparation of Rivastigmine

The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R1=R2=H or R1=H and R2=CH3 or an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).

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Reference£º
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