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Hey check lige denne syntese, som er MEGA let og LOVLIG og kan laves i mors køkken uden hun opdager det. Alle på boardet kan naturligvis finde ud af det da en 6. klasses elev med kemi/fysik i skolen kender til alle trinnene.
Here goes:
To a solution of 2.6 g of KOH pellets in 50 mL hot MeOH, there was added a mixture of 6.8 g 2,5-dimethoxythiophenol (see under 2C-T-2 for its preparation) and 5.8 g (s)-butyl bromide. The reaction was exothermic, with the deposition of white solids. This was heated on the steam bath for a few h, the solvent removed under vacuum, and the resulting solids dissolved in 250 mL H2O. Additional aqueous NaOH was added to bring universal pH paper to a full blue color. This was extracted with 3x40 mL CH2Cl2, the extracts pooled, and the solvent removed under vacuum. The residue was 2,5-dimethoxyphenyl (s)-butyl sulfide which was a pale yellow oil, weighing 10.12 g. It was sufficiently pure for use in the next reaction without a distillation step.
A mixture of 15.1 g POCl3 and 14.1 g N-methylformanilide was heated for 10 min on the steam bath. To this claret-colored solution was added 9.4 g of 2,5-dimethoxyphenyl (s)-butyl sulfide, and the mixture heated for 35 min on the steam bath. This was then added to 200 mL of well-stirred warm H2O (pre-heated to 55 °C) and the stirring continued until the oily phase had completely solidified (about 15 min). These light brown solids were removed by filtration, and washed with additional H2O. After sucking as dry as possible, these solids (12.14 g wet) were ground under an equal weight of MeOH which produced a yellowish crystalline solid with a mp of 76-81 °C. Recrystallization of a 0.4 g sample from an equal weight of boiling MeOH provided 0.27 g of 2,5-dimethoxy-4-(s-butylthio)benzaldehyde as a pale cream-colored crystalline material with a mp of 86-87 °C.
To a solution of 8.0 g of the crude 2,5-dimethoxy-4-(s-butylthio)benzaldehyde in 40 g of nitromethane there was added 0.38 g of anhydrous ammonium acetate, and the mixture was heated on the steam bath for 1 h. The reddish colored solution was decanted from some insoluble tan material and the excess nitromethane removed under vacuum. The heavy red oil that remained was diluted with an equal volume of boiling MeOH, and allowed to return to room temperature. The orange-colored crystals that slowly formed were removed by filtration and, after air drying, weighted 6.24 g. This was again recrystallized from an equal volume of MeOH, yielding 2,5-dimethoxy-4-(s-butylthio)-beta-nitrostyrene as yellow, somewhat beady crystals that weighed (when dry) 3.50 g and which had a mp of 62-65 °C. A small portion of this fraction was crystallized yet again from MeOH to provide an analytical sample that was yellow-orange in color, and had an mp of 68-69 °C. Anal. (C13H17NO4S) C,H.
A solution of LAH (120 mL of a 1 M solution in THF) was cooled, under He, to 0 °C with an external ice bath. With good stirring there was added 3.3 mL 100% H2SO4 dropwise, to minimize charring. This was followed by the addition of 8.83 g 2,5-dimethoxy-4-(s-butylthio)-beta-nitrostyrene in 80 mL anhydrous THF dropwise over the course of 2 h. After a few min further stirring, the temperature was brought up to a gentle reflux on the steam bath, and then all was cooled again to 0 °C. The excess hydride was destroyed by the cautious addition of 18 mL IPA followed first by 5 mL of 15% NaOH and then by 15 mL of H2O. The reaction mixture was filtered, and the filter cake washed with THF. The filtrate and washing were combined and stripped of solvent under vacuum providing about 8.5 g of a pale amber oil. Without any further purification, this was distilled at 135-150 °C at 0.4 mm/Hg to give 6.12 g of a clear white oil. This was dissolved in 30 mL IPA, and neutralized with 2.1 mL of concentrated HCl forming crystals immediately. Another 10 mL of IPA was added to allow the solids to be finely dispersed, and then about 100 mL of anhydrous Et2O were added. The solids were removed by filtration, Et2O washed, and air dried to constant weight. The product, 2,5-dimethoxy-4-(s)-butylthiophenethylamine hydrochloride (2C-T-17) was obtained as spectacular white crystals, weighing 5.67 g.
To a well-stirred solution of 6.08 g 2,5-dimethoxy-4-(s)-butylthio-beta-nitrostyrene (see under 2C-T-17 for its preparation) in 80 mL anhydrous THF under a He atmosphere, there was added 3.5 mL 10 M borane dimethylsulfide complex, followed by 0.5 g of sodium borohydride. As the stirring continued, the slightly exothermic reaction slowly faded from bright yellow to pale yellow, and eventually (after three days stirring) it was substantially colorless. There was then added 80 mL of 3 N HCl and the mixture heated on the steam bath for 1 h, and then allowed to return to room temperature. An additional 600 mL H2O was added (there was a combination of crystals and globby chunks in the aqueous phase) and this was then extracted with 3x75 mL CH2Cl2. The color went completely into the organic phase. This was washed with 2x50 mL aqueous K2CO3, yielding a rusty-red colored CH2Cl2 solution, which on removal of the solvent, yielded 4.5 g of a red oil. A side effort to make the sulfate salt at this stage with H2O and a little H2SO4, indeed gave solids, but all of the color remained in the sulfate salt. The red oil was dissolved in 45 mL IPA and neutralized with concentrated HCl to bright red, not yellow, on universal pH paper. The addition of 350 mL anhydrous Et2O instituted the slow precipitation of white crystals. After filtering and air drying, there was obtained 1.32 g 2,5-dimethoxy-4-(s)-butylthio-N-hydroxyphenethylamine hydrochloride (HOT-17). The aqueous phase from above was just neutralized with 25% NaOH (cloudy, slightly pink color) and then made basic with K2CO3 (the color becomes green). This was extracted with 3x75 mL CH2Cl2, the extracts pooled, and the solvent removed to yield 0.5 g of a white oil. This was dissolved in 5 mL IPA, neutralized with concentrated HCl, and diluted with a equal volume of Et2O. An additional 0.36 g of product was thus obtained.
...og til sidst vil jeg sige at hvis i ikke kan finde ud af det, er i enten meget dumme eller fra sundhedsstyrelsen.
MVH
Voorhees
PS: Ironi detected(så pressen ikke misforstår)!!!!
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