Enantiomerically pure N-(R)-alpha-methylbenzyl-4(R)-(chloromethyl)oxazolidinones (4R)-5a-k were synthesized in one step and high yields from various aziridine-2-methanols (S)-2a-k by intramolecular cyclization with phosgene. The alpha-methylbenzyl substituent on the nitrogen was easily cleaved to give both enanatiomers of 4-(chloromethyl)oxazolidinones (R)-7a and (S)-7a. (R)-7a was used for the efficient
对映体纯的N-(R)-α-甲基苄基-4(R)-(
氯甲基)
恶唑烷酮(4R)-5a-k一步合成,并从各种
氮丙啶-2-
甲醇(S)-2a-k中高收率通过
光气进行分子内环化。氮上的α-甲基苄基取代基很容易裂解,得到4-(
氯甲基)
恶唑烷酮(R)-7a和(S)-7a的两种对映体。(R)-7a用于有效合成(L)-高苯丙
氨醇类似物(S)-12a-j。我们还应用了相同的方法,以高收率制备了在C-4处含有杂原子取代的烷基的
恶唑烷酮9a-c。