反应条件
1: Et3N / tetrahydrofuran / 0 deg C, then 2 h, room t. 2: LDA(3 equiv.) / tetrahydrofuran / 4 h / Ambient temperature; addition, -70 deg C 3: tetrahydrofuran / cooling, then 1 h, room t. 4: Et3N / tetrahydrofuran / 0 deg C, then 2 h, room t. 5: 51 percent / LDA(3 equiv.) / tetrahydrofuran / 23 h / Ambient temperature; addition, -70 deg C View Scheme
参考文献
Chemical and Pharmaceutical Bulletin, , vol. 29, # 9 p. 2496 - 2502
