16α-bromomethyl-3-hydroxyestra-1,3,5(10)-trien-17β-yl acetate | 925910-91-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: 16α-bromomethyl-3-hydroxyestra-1,3,5(10)-trien-17β-yl acetate
• 英文别名: [(8R,9S,13S,14S,16R,17S)-16-(bromomethyl)-3-hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl] acetate
• CAS: 925910-91-4
• 化学式: C₂₁H₂₇BrO₃
• 分子量: 407.348
• InChiKey: JGPWHBFTBXTBQF-GXZVXFIFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.2
• 重原子数：
  25
• 可旋转键数：
  3
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  16α-bromomethyl-3-hydroxyestra-1,3,5(10)-trien-17β-yl acetate 在 sodium azide 、 碳酸氢钠 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 80.0h， 生成 16α-azidomethylestra-1,3,5(10)-triene-3,17β-diol
  参考文献：
  名称：

  Estrogen receptor binding tolerance of 16α-substituted estradiol derivatives

  摘要：

  In order to examine the tolerance of the estrogen receptor for 16 alpha-substituents in estradiol, we have synthesized various 16 alpha-substituted estrogens and determined their binding affinity for receptor by a competitive radiometric binding assay. The substituents ranged from small, single-atom substituents (halogens), two-atom substituents (halomethyl groups), to larger alkyl groups and ultimately alkyl groups bearing various functionality, including fluorescent (nitrobenzoxadiazole, NBD) and photoreactive (nitroazidophenyl, NAP) groups. The estrogen receptor seems to have a moderate tolerance for bulky substituents: All of the halogen and halomethyl substituents bind with an affinity at least 50% that of estradiol; in the three atom alkyl series, the affinity declined markedly from propargyl (44%) and allyl (38%) to propyl (5%), suggestive of detailed steric constraints or a preference for unsaturation. The larger, more highly functionalized derivatives ranged in affinity from 0.1-7%, with the highest affinity binders being benzyl (5%) and 4-phenoxy-2(E)-butenyl (7%); most of the lowest affinity ones were the bulky fluorescent and photoreactive derivatives. Thus, the estrogen receptor has good tolerance for estradiol derivatives substituted at the 16 alpha-position with nonpolar groups of moderate bulk; however, with groups of larger bulk, affinity is much lower and becomes highly dependent upon the polarity and detailed structure of the substituents.

  DOI：

  10.1016/0039-128x(88)90046-3
• 作为产物：
  描述：

  3-(α-ethoxyethoxy)-16-ethoxymethylidenestra-1,3,5(10)-trien-17β-ol 在 盐酸 、 sodium tetrahydroborate 、 四溴化碳 、 水 、 三苯基膦 作用下， 以 四氢呋喃 、 吡啶 、 乙醇 、 二氯甲烷 为溶剂， 反应 9.0h， 生成 16α-bromomethyl-3-hydroxyestra-1,3,5(10)-trien-17β-yl acetate
  参考文献：
  名称：

  Estrogen receptor binding tolerance of 16α-substituted estradiol derivatives

  摘要：

  In order to examine the tolerance of the estrogen receptor for 16 alpha-substituents in estradiol, we have synthesized various 16 alpha-substituted estrogens and determined their binding affinity for receptor by a competitive radiometric binding assay. The substituents ranged from small, single-atom substituents (halogens), two-atom substituents (halomethyl groups), to larger alkyl groups and ultimately alkyl groups bearing various functionality, including fluorescent (nitrobenzoxadiazole, NBD) and photoreactive (nitroazidophenyl, NAP) groups. The estrogen receptor seems to have a moderate tolerance for bulky substituents: All of the halogen and halomethyl substituents bind with an affinity at least 50% that of estradiol; in the three atom alkyl series, the affinity declined markedly from propargyl (44%) and allyl (38%) to propyl (5%), suggestive of detailed steric constraints or a preference for unsaturation. The larger, more highly functionalized derivatives ranged in affinity from 0.1-7%, with the highest affinity binders being benzyl (5%) and 4-phenoxy-2(E)-butenyl (7%); most of the lowest affinity ones were the bulky fluorescent and photoreactive derivatives. Thus, the estrogen receptor has good tolerance for estradiol derivatives substituted at the 16 alpha-position with nonpolar groups of moderate bulk; however, with groups of larger bulk, affinity is much lower and becomes highly dependent upon the polarity and detailed structure of the substituents.

  DOI：

  10.1016/0039-128x(88)90046-3

文献信息

• Neighboring group participation
  作者：Ágota Szájli、János Wölfling、Erzsébet Mernyák、Renáta Minorics、Árpád Márki、George Falkay、Gyula Schneider

  DOI：10.1016/j.steroids.2005.09.008

  日期：2006.2

  The four possible isomers of 3-benzyloxy-16-hydroxymethylestra-1,3,5(10)-trien-17-ol (1a-4a) with proven configurations were converted into the corresponding 3-benzyloxy-16-bromomethylestra-1,3,5(10)-triene-3,17-diols (5e-8e). Depending on the reaction conditions the cis isomers of 3-benzyloxy-16-hydroxymethylestra-1,3,5(10)-trien-17-ol (1a and 2a) were transformed into 3-benzyloxy-16-bromomethylestra-1,3,5(10)-trien-17-yl acetate (5b and 6b) or 16-bromomethyl-3-hydroxyestra-1,3,5(10)-trien-17-yl acetate (5c and 6c) on treatment with HBr and acetic acid. The mechanism of the process can be interpreted as involving front-side neighboring group participation. Under similar experimental conditions, the trans isomers (3a and 4a) yielded only 3-benzyloxy-16-acetoxymethylestra-1,3,5(10)-trien-17-yl acetates (3b and 4b) or 16-acetoxymethylestra-1,3,5(10)-triene-3,17-diyl diacetates (3d and 4d). Both the cis (1a and 2a) and the trans (3a, and 4a) isomers were transformed into 16-bromomethylestra-1,3,5(10)-trien-17-ol (5a-8a) by the Appel reaction on treatment with CBr4/Ph3P. Debenzylation of 5a-8a was carried out with HBr and acetic acid to yield 5e-8e. The debenzylation process in the presence of acetic anhydride produces the diacetates 5d-8d. The structures of the compounds were determined by means of MS, H-1 NMR and C-13 NMR spectroscopic methods. Compounds 5c-8c and 5e-8e were tested in a radioligand-binding assay. Except for the affinity of 7e for the estrogen receptor (K-1 = 2.55 nM), thew affinities of the eight compounds (5c-8c and 5e-8e) for the estrogen, androgen and progesterone receptors are low (K-i > 0.55, 0.52 and 0.21 mu M, respectively). (c) 2005 Elsevier Inc. All rights reserved.