methyl 3-(butylselanyl)propanoate 、 维生素 C 在
Lipase B da C. antarctica 作用下,
以
丙酮 为溶剂,
反应 48.0h,
以72%的产率得到(S)-2-((R)-3,4-dihydroxy-5-oxo-2,5-dihydrofuran-2-yl)-2-hydroxyethyl 3-(butylselanyl)propanoate
参考文献:
名称:
Direct biocatalysed synthesis of first sulfur-, selenium- and tellurium- containing l-ascorbyl hybrid derivatives with radical trapping and GPx-like properties
Simple cleavage of diorganyl diselenides with NaBH4/PEG-400 and direct Michael addition to electron-deficient alkenes
摘要:
Nucleophilic species of selenium were generated in situ from the reaction of diorganyl diselenide with NaBH4 in PEG-400 as solvent and selectively added to several alpha,beta-unsaturated ketones, esters, acid, and nitrile. By this simple procedure, chalcogenolate anions were directly added at mild conditions, furnishing the respective Michael adducts in good yields. (C) 2013 Elsevier Ltd. All rights reserved.