Methyl 4-chloro-2-nitrobenzoate combines an ester, an ortho-nitro group, and a para-chloro substituent on a single benzene ring, creating a strongly activated system for nucleophilic aromatic substitution. The chlorine is readily displaced by amines, alkoxides, and thiolates, while the nitro group can be reduced to an aniline for subsequent cyclisation onto the ester. These complementary handles make it a practical starting point for benzimidazole, quinazolinone, and related nitrogen heterocycle syntheses in medicinal chemistry. TCI supplies this solid in a 25 g pack; weigh it in a fume hood and store it tightly closed in a cool, dry, light-protected place.
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- Ferguson et al. (1997). Mechanism and Stereochemistry of the Reaction of Dichloroplatinum(II) Complexes with Diazo Compounds. X-ray Structures of Four Key Products: [(2R,3R)-Bis(diphenylphosphino)butane]chloro- [(S)-chloro(methoxycarbonyl)methyl]platinum(II), (η4-1,5-Cyclooctadiene)[3-chloro-5-(dimethoxyphosphonyl)-2- methoxy-4,1,2-platinaoxaphospholane P-oxide], (R,R)-[Chloro(dimethoxyphosphonyl)methyl][chloro- (trimethylsilyl)methyl](1,5-cyclooctadiene)platinum(II), and Chloro[chloro(dimethoxyphosphonyl)methyl](η4-1,5-cyclooctadiene)platinum(II). Organometallics doi:10.1021/om9607964
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