Ciufolini, Marco A.; Roschangar, Frank, Angewandte Chemie, 1996, vol. 108, # 15, p. 1789 - 1791
作者:Ciufolini, Marco A.、Roschangar, Frank
DOI:——
日期:——
Enantioselective synthesis of (S)-N,N-diethyl-2-formyl-2-(methoxymethoxy)butyramide, a key intermediate for 20(S)-camptothecin analogues, via asymmetric bromolactonization
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.