N-(tert-butoxycarbonyl)glycine → HCID 89858639, compound

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Reaction Steps

Compound 1 (100 mg, 0.167 mmol) obtained in Example 1 was dissolved in chloroform (2 mL), and stirred at room temperature for 4 hours after adding N-(tert-butoxycarbonyl)glycine (Tokyo Chemical Industry Co., Ltd.; 55 mg, 0.250 mmol), diisopropylethylamine (0.146 mL, 0.833 mmol), and HATU (O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate) (Aldrich; 127 mg, 0.333 mmol). The aqueous layer was extracted with ethyl acetate after adding a saturated sodium bicarbonate aqueous solution to the reaction mixture. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure after filtration. The resulting residue was purified by silica gel column chromatography (chloroform/methanol=100/0 to 97/3) to give tert-butyl 2-((3R,4R)-3,4-bis((9Z,12Z)-octadec-9,12-dienyloxy)pyrrolidin-1-yl)-2-oxoethylcarbamate.

Provenance & Evidence