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The reaction was quenched with sat. aq NaHCO SB 3 sb and the mixture was extracted with CH SB 2 sb Cl SB 2 sb (3 × 2 mL). The reaction was quenched with sat. aq Na SB 2 sb S SB 2 sb O SB 3 sb (5 mL) and sat. aq NaHCO SB 3 sb (5 mL). The mixture was extracted with CH SB 2 sb Cl SB 2 sb (3 × 10 mL), and the combined organic layers were washed with brine, dried (anhyd Na SB 2 sb SO SB 4- sb ), filtered, and concentrated under reduced pressure. The reaction was quenched with sat. aq NaHCO SB 3 sb and the mixture was extracted with CH SB 2 sb Cl SB 2 sb (3 × 2 mL). [Extracted from the article]