描述了新型咪唑甲基3-(4-(芳基-2-基氨基)苯基)丙酸酯在MCF-7 CYP26A1微粒体测定中的合成和强抑制活性。CYP26A1 mRNA的诱导用于评估化合物增强类视黄醇反应性神经母细胞瘤细胞系中全反式视黄酸(ATRA)的生物学效应的能力。最有希望的抑制剂3-咪唑-1-基-2-甲基-3- [4-(萘-2-基氨基)-苯基]-丙酸甲酯(20),IC 50为3 nM(相比用利阿罗唑IC 50 540纳米和R116010 IC 50为10nM)中的溶液用于CYP选择性使用CYP酶,致突变性(艾姆斯画面),和肝稳定性的面板进一步评估。
DOI:
10.1021/jm101583w
作为产物:
描述:
2-溴代异丁酸甲酯 、 2-(4-hydroxyphenyl)-1,3-dioxalane sodium salt 以44%的产率得到methyl-2,2-dimethyl-3-hydroxy-3-(4-hydroxyphenyl)-propionate
参考文献:
名称:
Chromium-mediated aldol and homoaldol reactions on solid support directed towards an iterative polyol strategy
摘要:
Chromiumn-Reformatsky and chromium-homoaldol reactions run Under neutral and mild reaction conditions. They are highly chemoselective, tolerant towards most common functional groups, and are not prone to retroaldol reactions. Initial studies directed to transfer these homogeneous chromium-mediated solution-phase reactions to solid phase are presented. The main objective was to develop a methodology to aid a combinatorial iterative strategy to polyols (polyketides) on solid phase. A general reactivity problem was observed with polystyrene based resins compared to the solution-phase reactions, independent if the electrophilic (aldehyde) or nucleophilic (bromide) end of the polyol chain was supported to the resin. A complicated penetration, or loss of the polar solvent environment after penetration into the resin, might be responsible for the reduced reactivity. Application of either a soluble polystyrene resin or a polystyrene resin with a polar polyethylene glycol tether resulted in improved yields. (C) 2004 Elsevier Ltd. All rights reserved.
Aldolreaction of trimethylsilylenolate with aldehyde proceeded in the presence of a catalytic amount of a Lewis base, N-methylimidazole, and lithium chloride in DMF at room temperature. Not only aryl aldehyde but also alkyl aldehyde provided the aldol product in satisfactory yields. The reaction was mild enough to apply to the aldehyde having HO, AcO, THPO, TBDMSO, MeS, pyridyl or olefinic group
Aldolreaction of trimethylsilylenolate with aldehydes proceeded in the presence of a catalytic amount of a Lewis base, pyridine N-oxide, and lithium chloride in DMF at room temperature. Not only aryl aldehydes but also alkyl aldehydes provided the aldol products in satisfactory yields. The reaction was mild enough to apply to aldehydes having HO, AcO, THPO, TBDMSO, MeS, pyridyl, or olefinic groups
[EN] CYP26 INHIBITORS<br/>[FR] INHIBITEURS DE CYP26
申请人:CANCER REC TECH LTD
公开号:WO2009153566A1
公开(公告)日:2009-12-23
A compound of formula (I) wherein X is selected from O, S, NH or CH2; Rd and Rp are optional naphthyl group substituents; RHet is imidazolyl, triazolyl or pyridyl; and Rc is C1-4 alkyl substituted by a group selected from: hydroxy, amino, amido, carboxy, C1-7 alkyl ester, C5-7 aryl-C1-2 alkyl ester, sulfonamino, sulfinamino, hydroxamino and tetrazolyl.
Self-promoted aldolreactionbetweenaldehydes having Lewis base moieties and trimethylsilylenolates proceeded smoothly to afford the corresponding aldols in good to high yields. It is noted that various functionalized aldols can be directly obtained without protection of functional groups in the above reaction.
Chromium-mediated aldol and homoaldol reactions on solid support directed towards an iterative polyol strategy
作者:Ludger A. Wessjohann、Harry Wild、Henri S. Schrekker
DOI:10.1016/j.tetlet.2004.10.038
日期:2004.11
Chromiumn-Reformatsky and chromium-homoaldol reactions run Under neutral and mild reaction conditions. They are highly chemoselective, tolerant towards most common functional groups, and are not prone to retroaldol reactions. Initial studies directed to transfer these homogeneous chromium-mediated solution-phase reactions to solid phase are presented. The main objective was to develop a methodology to aid a combinatorial iterative strategy to polyols (polyketides) on solid phase. A general reactivity problem was observed with polystyrene based resins compared to the solution-phase reactions, independent if the electrophilic (aldehyde) or nucleophilic (bromide) end of the polyol chain was supported to the resin. A complicated penetration, or loss of the polar solvent environment after penetration into the resin, might be responsible for the reduced reactivity. Application of either a soluble polystyrene resin or a polystyrene resin with a polar polyethylene glycol tether resulted in improved yields. (C) 2004 Elsevier Ltd. All rights reserved.