Stereoselective synthesis of anti-2-oxazolidinones by Ph3P–CCl4–Et3N mediated SN2 cyclization of N-Boc-β-amino alcohols
作者:G Madhusudhan、G Om Reddy、J Ramanatham、P.K Dubey
DOI:10.1016/s0040-4039(03)01508-9
日期:2003.8
Ethyl anti-4-substituted phenyl-2-oxo-1,3-oxazolidine-5-carboxylates were synthesized stereoselectively in excellent yields using the Ph3P–CCl4–Et3N system by SN2 cyclization of N-Boc-β-amino alcohols. syn to anti conversion of ethyl 4-substituted phenyl-2-oxo-1,3-oxazolidine-5-carboxylates using DBU as base is also described.
乙基反-4-取代的苯基-2-氧代-1,3-恶唑烷-5-羧酸酯被立体选择性地以优良产率使用pH值合成3 P-的CCl 4 -Et 3通过S N系统Ñ 2环化Ñ -Boc- β-氨基醇。还描述了使用DBU作为碱的4-取代的苯基-2-氧代-1,3-恶唑烷-5-羧酸乙酯的顺式至反式转化。