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. 72-14-0, Name is Sulfathiazole, molecular formula is C9H9N3O2S2. In an article, author is Li, Xingguang,once mentioned of 72-14-0, SDS of cas: 72-14-0.
Organocatalytic Enantioselective Synthesis of Chiral Allenes: Remote Asymmetric 1,8-Addition of Indole Imine Methides
An organocatalytic enantioconvergent synthesis of chiral tetrasubstituted allenes is disclosed. With suitable chiral phosphoric acid catalysts, a range of racemic indole-substituted propargylic alcohols reacted with nucleophiles to provide efficient access to a series of enantioenriched allenes with high enantioselectivities. Control experiments suggested a mechanism involving remotely controlled asymmetric 1,8-addition of the in situ generated indole imine methide via a bifunctional transition state.
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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