Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.

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The red spread out from the centre of the sky, seemed to tinge the smoke haze over the kopjes, and to light the trees with a hot sulphurous yellow.

從我們頭頂，暮色的紅云遍布了天際国产亚洲午夜福利专区。把小丘蒸騰的霧靄調(diào)繪成微紅的霧裟久久频这里精品99，灌木變得亮起來，似灼熱的硫磺偷拍盗摄ⅩⅩⅩⅩⅩ亚洲人。

H. L. Mencken wrote sulphurous dispatches sitting in his Pants with a tan blowing on him, and there was talk of running him out of town for referring to the local citizenry as yokels .

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Perry is in rehearsal for the West End revival of David Mamet's play Sexual Perversity in C你好cago, a sulphurous comedy drama of bad manners and sexual mores among youngish professional types in the Windy city during the Seventies.

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