acetic acid 2-[5-(2,2-dimethylpropionylamino)-pyrazin-2-yl]-2-oxo-ethyl ester 、 、
葡萄糖 、
nicotinamide adenine dinucleotide phosphate 、
sodium hydroxide 在
葡萄糖 sodium hydroxide 、
氯化钠 、
乙酸乙酯 、
Sodium sulfate-III 、 eluent 作用下,
以
甲基叔丁基醚 为溶剂,
反应 22.38h,
以44.76 g (S)—N-[5-(1,2-dihydroxy-ethyl)-pyrazin-yl]-2,2-dimethyl-propionamide (4) (96.4% HPLC purity, [SupelcoSil ABZ+, 250×4.6 mm, eluent 20-90% acetonitrile/water+0.1% TFA over 10 min at 1 mL/min, detection at UV 300 nm, retention time 5.3 min], ee>99.9% [Chiralpak IA, 250×4.6 mm, 5 μm, eluent 50% Heptane 50% Ethanol/Methanol 1:1 over 20 min at 1 mL/min, detection at UV 240 nm, retention time enantiomers 9.3 and 10.9 min]) were isolated as a light orange, highly viscous oil的产率得到N-[5-(1(S),2-dihydroxyethyl)-pyrazin-2-yl]-2,2-dimethyl-propionamide