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tert-Butyl diethylphosphonoacetate (CAS 27784-76-5) is a phosphonate ester featuring a diethyl phosphonate group combined with a tert‑butyl ester protecting group. The molecular formula is C₁₀H₂₁O₅P, and the molecular weight is 252.24 g/mol. Structurally, the molecule consists of an acetate backbone with a diethylphosphoryl group (−P(=O)(OCH₂CH₃)₂) at the α‑position and a tert‑butyl ester at the carboxyl terminus.

3-Iodo-4-methylbenzoic acid (CAS 82998-57-0) is a halogenated aromatic carboxylic acid featuring an iodine substituent at the 3‑position and a methyl group at the 4‑position of the benzene ring. The molecular formula is C₈H₇IO₂, and the molecular weight is 262.04 g/mol. Structurally, the molecule consists of a benzoic acid core with a methyl group para to the carboxylic acid and an iodine atom ortho to the methyl group.

4-Bromo-2-fluoro-N-methylbenzamide (CAS 749927-69-3) is a substituted benzamide derivative featuring bromine and fluorine substituents on the aromatic ring and an N-methylamide functionality. The molecular structure of 4-Bromo-2-fluoro-N-methylbenzamide combines halogenated aromatic ring with an N-methyl carboxamide, providing multiple handles for further synthetic manipulation.

3,4-Methylenedioxy-beta-nitrostyrene (CAS 1485-00-3) is a nitroalkene compound featuring a 3,4-methylenedioxyphenyl group conjugated with a beta-nitrostyrene moiety. The molecular structure of 3,4-Methylenedioxy-beta-nitrostyrene comprises a benzodioxole ring system with a trans-2-nitrovinyl substituent at the 5-position.

N,N'-Dimethyl-1,2-ethanediamine (CAS 110-70-3) is a symmetrical diamine featuring two methyl groups attached to the nitrogen atoms of a 1,2-ethanediamine backbone. As a bifunctional amine, N,N'-Dimethyl-1,2-ethanediamine contains two secondary amine functionalities capable of participating in a wide range of chemical reactions.

2-Chlorobenzoxazole (CAS 615-18-9) is a heterocyclic building block featuring a benzoxazole core with a chlorine substituent at the 2-position. The benzoxazole ring system of 2-Chlorobenzoxazole consists of a fused benzene and oxazole ring, creating a planar, aromatic heterocycle with significant synthetic utility.