Enantioselective synthesis of (S)-N,N-diethyl-2-formyl-2-(methoxymethoxy)butyramide, a key intermediate for 20(S)-camptothecin analogues, via asymmetric bromolactonization
作者:Sang-sup Jew、Eun-young Roh、Hee-jin Kim、Myoung Goo Kim、Hyeung-geun Park*
DOI:10.1016/s0957-4166(00)00376-1
日期:2000.10
A new enantioselective synthetic method for enantiomerically pure (S)-N,N-diethyl-2-formyl-2(methoxymethoxy)butyramide 5, a versatile key intermediate has been developed employing asymmetric bromolactonization using (S)-proline as the chiral auxiliary. (C) 2000 Elsevier Science Ltd. All rights reserved.