Mechanism-based design of simple, symmetrical, easily prepared, potent antimalarial endoperoxides
作者:Gary H. Posner、Dasong Wang、Lluïsa González、Xueliang Tao、Jared N. Cumming、Donna Klinedinst、Theresa A. Shapiro
DOI:10.1016/0040-4039(95)02329-1
日期:1996.2
Mechanism-based design, two-step synthesis, and in vitro antimalarial testing showed thermally stable, crystalline, bicyclic endoperoxides 2a and 2b to be potent antimalarials. Their reduction by FeBr2 proceeds via oxy-radicals and then carbon radicals that undergo β-scission to form an alkene and a high-valent FeO species.
Wittig; Obermann, Chemische Berichte, 1934, vol. 67, p. 2053,2059
作者:Wittig、Obermann
DOI:——
日期:——
Wittig; Obermann, Chemische Berichte, 1935, vol. 68, p. 2214,2216, 2217
作者:Wittig、Obermann
DOI:——
日期:——
1,3-Bis(phenylmercapto)propane and 1-chloro-3-(phenylmercapto)propane: useful precursors for 1,3-dilithiopropane synthons in the preparation of 1,5-diols
作者:Francisco Foubelo、Miguel Yus
DOI:10.1016/s0040-4039(00)00764-4
日期:2000.6
Treatment of 1,3-bis(phenylmercapto)propane (1) with an excess of lithium and a catalytic amount of DTBB (3.5 mol%) at -78 degrees C followed by reaction with a carbonyl compound [(BuCHO)-Bu-t, PhCHO, (PhCH2)(2)CO, Et2CO, (CH2)(5)CO, (CH2)(7)CO, (-)-menthone, Ph2CO] leads, after hydrolysis with water, to symmetrically substituted 1,5-diols (2). Starting from 1-chloro-3-(phenylmercapto)propane (3) and by successive treatment with: (a) lithium-naphthalene at -78 degrees C; (b) a carbonyl compound Me2CO, (CH2)(5)CO, (CH2)(7)CO, (-)-menthone, [CH3(CH2)(4)](2)CO} at the same temperature; (c) lithium powder at -50 degrees C; and (d) a second carbonyl compound [(BuCHO)-Bu-t, PhCHO] at the same temperature and final hydrolysis with water yields unsymmetrically substituted 1,5-diols (4). (C) 2000 Elsevier Science Ltd. All rights reserved.