Chemistry is traditionally divided into organic and inorganic chemistry. Safety of N-(1,3-Dioxo-1,3-dihydroisobenzofuran-4-yl)acetamide, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 6296-53-3
The present invention relates to a process for the preparation of 1-(3-ethoxy-4-methoxy-phenyl)-2-methylsulfonyl-ethanamine, an intermediate for the preparation of apremilast via a compound of Formula (V) wherein R is (C1-C4)alkyl, (C1-C4)haloalkyl, -O(C1-C4)alkyl, or ?O-benzyl, and L is a leaving group.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H3472O – PubChem