In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis of D-camphor based γ-amino acid (1S,3R)-3-amino-2,2,3-trimethylcyclopentane carboxylic acid, published in 2010-03-30, which mentions a compound: 560-09-8, mainly applied to camphor based amino acid aminotrimethyl cyclopentane carboxylic synthesis; camphoric anhydride nucleophilic ring opening benzyl alc; isocyanate Curtius rearrangement hydrogenolysis, Recommanded Product: 560-09-8.
Synthesis of a γ-amino acid derived from (1R,3S)-camphoric acid is described. D-(+)-Camphoric anhydride, prepared from D-(+)-camphoric acid by treatment with methanesulfonyl chloride and triethylamine, was reacted with benzyl alc. and catalytic DMAP, and subsequently reacted in a Curtius rearrangement to afford the corresponding carbamate derivative This derivative was converted to the desired γ-amino acid through hydrogenolysis.
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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com