Potent inhibitors of farnesyltransferase and geranylgeranyltransferase-I
摘要:
Compound 1 has been shown to be a dual prenylation inhibitor with FPTase (IC50 = 2 nM) and GGPTase-1 (IC50 = 95 nM). Analogues of 1, which replaced the cyanophenyl group with various biaryls, led to the discovery of highly potent dual FPTase/GGPTase-1 inhibitors. 4-Trifluoromethylphenyl, trifluoropentynyl, and trifluoropentyl were identified as good p-cyano replacements. (C) 2002 Published by Elsevier Science Ltd.
Synthesis of novel ring-substituted histidines and histamines
作者:Rahul Jain、Louis A. Cohen、Michael M. King
DOI:10.1016/s0040-4020(97)00177-4
日期:1997.3
Synthesis of novel 2-cycloalkyl-L-histidines and 2-cycloalkylhistamines via radical alkylation with cycloalkylcarboxylic acids and silver nitrate in the presence of 10% H2SO4 by ammonium persulfate is described. The method is also extended to the synthesis of 1,2-dialkyl-L-histidines and 1,2-dialkylhistamines.
描述了在过硫酸铵存在的10%H 2 SO 4存在下,通过与环烷基羧酸和硝酸银的自由基烷基化反应来合成新型的2-环烷基-L-组氨酸和2-环烷基组胺。该方法还扩展到1,2-二烷基-L-组氨酸和1,2-二烷基组胺的合成。
Synthesis and alkaline hydrolysis of (pentafluoroethyl)imidazoles
作者:Shozo Fujii、Yasuo Maki、Hiroshi Kimoto、Louis A. Cohen
DOI:10.1016/s0022-1139(00)81992-2
日期:1987.4
yields of 19% and 27%, respectively. Alkaline hydrolysis converts the 2-pentafluoroethyl group to trifluoroacetyl. The reaction mechanism, involving a diazafulvene intermediate, is analogous to that elucidated for (trifluoromethyl)imidazoles; however, the pentafluoroethyl group is markedly more reactive to hydrolysis than the trifluoromethyl group. For imidazole derivatives, the ratio of reactivities is
Overcoming inaccessibility of fluorinated imines – synthesis of functionalized amines from readily available fluoroacetamides
作者:Paweł J. Czerwiński、Bartłomiej Furman
DOI:10.1039/c9cc04111g
日期:——
Although imines are convenient substrates for the synthesis of functionalized amines, they may be hard to obtain, as in the case of fluorinatedimines. To aid in overcoming this issue, we propose a protocol of corresponding amine synthesis from simple fluoroacetic acid-derived amides using Schwartz's reagent.
Regiospecific alkylation of histidine and histamine at C-2
作者:Rahul Jain、Louis A. Cohen、Nahla Ahmed El-Kadi、Michael M. King
DOI:10.1016/s0040-4020(96)01193-3
日期:1997.2
The first regiospecific synthesis of 2-alkyl-L-histidines and 2-alkylhistamines starting from fully protected L-histidine and histamine via silver catalyzed radical decarboxylative oxidation of alkylcarboxylic acids by ammonium persulfate in 10% H2SO4 is described.
描述了从完全保护的L-组氨酸和组胺开始,通过过硫酸铵在10%H 2 SO 4中的银催化的烷基羧酸自由基脱羧氧化反应,首次合成2-烷基-L-组氨酸和2-烷基组胺。
Photochemical trifluoromethylation of some biologically significant imidazoles