By Pavol Kováč
Long past are the times whilst artificial courses integrated parallel preparative experiments to rfile reproducibility of the experimental protocols and whilst journals required such documentation. the hot confirmed artificial equipment sequence addresses matters to chemists relating to irreproducibility of artificial protocols, loss of characterization facts for brand spanking new compounds, and inflated yields said in lots of chemical communications--trends that experience lately turn into a major challenge. quantity one in every of Carbohydrate Chemistry: confirmed man made equipment contains extra special models of protocols previous Read more...
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Additional info for Carbohydrate Chemistry : Proven Synthetic Methods
Isolated yield. Yield on 1 mmol scale. Starting material recovered in >90% yield (measured by 1H NMR). OAc O BnO AcO OBn 8 (33%) 6 Carbohydrate Chemistry: Proven Synthetic Methods Compounds were visualized by spraying with 10% H2SO4 in EtOH, and heating until permanent spots developed. Column chromatography was performed on Merck Kieselgel 60 (63–200 mesh). 5 mL) and TFA (150 μL). The solution was stirred at 70°C in a round-bottom flask closed with a glass stopper. 1 for typical reaction times).
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8 (OCH3). Anal. 50. 47. 89 mmol) in dry DMF (18 mL). 33 mmol, 5 equiv) as described above for the preparation of 13. 37) were formed. 37. 2 (OCH3-1, OCH3-MOM). Anal. 02. 01. 14 mmol) in dry DMF (4 mL). 5 equiv) as described for the preparation of 13. 49) were formed. 5 h, 2:3 hexane–EtOAc). The mixture was cooled to −30°C and the reaction was quenched by addition of MeOH (2 mL). The resulting solution was diluted with CH 2Cl2 (5 mL), washed with water (5 mL), and the aqueous phase was extracted with CH2Cl2 (3 × 5 mL).