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. 95-14-7, Name is 1H-Benzo[d][1,2,3]triazole, molecular formula is C6H5N3. In an article, author is Merino, P,once mentioned of 95-14-7, Computed Properties of https://www.ambeed.com/products/95-14-7.html.
Ready access to enantiopure 5-substituted-3-pyrrolin-2-ones from N-benzyl-2,3-O-isopropylidene-D-glyceraldehyde nitrone (BIGN)
The reaction of the lithiated salt of methyl propiolate with N-benzyl-2,3-O-isopropylidene-D-glyceraldehyde nitrone (BIGN) afforded the corresponding propargyl hydroxylamines in a stereocontrolled way depending on the nature of the Lewis acid used as an additive. Subsequent reduction of the obtained hydroxylamines provided chiral 5-substituted-3-pyrrolin-2-ones, in high overall yields. (C) 1998 Elsevier Science Ltd. All rights reserved.
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Reference:
Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem