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Part-IResults and DiscussionOOOHDimethyl sulphateOHHO8Aq. KOHO9OConc. HNO 30-5 o COOOHaq. KMnO 4OHO11NO 2O10NO 2Methanoldry HCl gasOOOOFe/HClOOORefluxNO 2O12 IxvScheme-12NH 23.1.2.d. Synthesis of 2-carbethoxy-3-amino-4-methoxybenzo(b)thiophene (Ixvi)a. Synthesis of 2-nitro-6-methoxybenzonitrile 31 14m-Dinitrobenzene 13 was reacted with potassium cyanide in water and the purple mixturewas allowed to stand at RT for 2-3 days. The black precipitate separated out wascollected. The filtrate was diluted with cold water & allowed to stand overnight to obtainthe second crop of the product. The combined precipitates were extracted withchloroform, which on evaporation gave the 2-nitro-6-methoxy benzonitrile 14 as a redpowder.b. Synthesis of methyl thioglycolate 32 16Dry HCl gas was bubbled in methanol containing thioglycolic acid 15 under ice-coldconditions for 5-6 hrs. Next day the reaction mixture was boiled on water bath for 2 hrs,cooled to RT and reaction mixture was quenched with ice water & extracted withchloroform. Chloroform extracts on evaporation gave yellow colored methylthioglycolate 16.74