(3R,4S,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne | 215394-23-3

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: (3R,4S,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne
• 英文别名: (3S,4S,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne；(3R,4S,5S)-bis[(tert-butyldimethylsilyl)oxy]-4-methyl-oct-1-en-7-yne；(3R,4S,5S)-3,5-bis(t-butyldimethylsilyloxy)-4-methyl-1-octen-7-yne；tert-butyl-[(3R,4S,5S)-5-[tert-butyl(dimethyl)silyl]oxy-4-methyloct-1-en-7-yn-3-yl]oxy-dimethylsilane
• CAS: 215394-23-3
• 化学式: C₂₁H₄₂O₂Si₂
• 分子量: 382.734
• InChiKey: ISAIOCNIQWJIBA-QRVBRYPASA-N

物化性质

• 沸点：
  376.8±42.0 °C(Predicted)
• 密度：
  0.870±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.61
• 重原子数：
  25
• 可旋转键数：
  10
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.81
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (3R,4S,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne 在 tris-(dibenzylideneacetone)dipalladium(0) 、 camphor-10-sulfonic acid 、 三乙胺 、 三苯基膦 作用下， 以 甲醇 、 甲苯 为溶剂， 生成 (5Z,7E)-(1S,2S,3S)-2-Methyl-9,10-seco-5,7,10(19)-cholestatriene-1,3,25-triol (
  参考文献：
  名称：

  一种新颖实用的途径，用于1个α，25-二羟基维生素D3类似物的A环烯炔合子：1个α，25-二羟基维生素D2和3-甲基-1,25-二羟基维生素D3的A环非对映异构体的合成。

  摘要：

  开发了一种新颖而实用的通往A环烯炔合子（2）的途径，该途径可用于多种1α，25-二羟基维生素D3（1）的A环类似物。这种新方法改进了1的A环非对映异构体，化合物13-15的合成，以及新的类似物2-甲基-1,25-二羟基维生素D3（4）及其所有可能的非对映异构体的合成。对2-甲基类似物的生物学评估表明，α-α-β-异构体的效力比1。

  DOI：

  10.1016/s0960-894x(97)10204-9
• 作为产物：
  描述：

  (2R,3R)-1-[tert-butyl(diphenyl)silyl]oxy-2-methyl-6-trimethylsilylhex-5-yn-3-ol 在 2,6-二甲基吡啶 、 cerium(III) chloride 、 草酰氯 、 四丁基氟化铵 、 4-甲基苯磺酸吡啶 、 对甲苯磺酸 、 二甲基亚砜 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 10.0h， 生成 (3R,4S,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne
  参考文献：
  名称：

  Synthesis, Biological Evaluation, and Conformational Analysis of A-Ring Diastereomers of 2-Methyl-1,25-dihydroxyvitamin D₃ and Their 20-Epimers:  Unique Activity Profiles Depending on the Stereochemistry of the A-Ring and at C-20

  摘要：

  All eight; possible A-ring diastereomers of 2-methyl-1,25-dihydroxyvitamin D-3 (2) and 2-methyl-20-epi-1,25-dihydroxyvitamin D-3 (3) were convergently synthesized. The A-ring enyne synthons 19 were synthesized starting with methyl(S)-(+)- or (R)-(-)-3-hydroxy-2-methylpropionate (8). This was converted to the alcohol 14 as a 1:1 epimeric mixture in several steps. After having been separated by column chromatography, each isomer led to the requisite A-ring enyne synthons 19 again as 1:1 mixtures at C-1. Coupling of the resulting A-ring enynes 20a-h with the CD-ring portions 5a,b in the presence of a Pd catalyst afforded the 2-methyl analogues 2a-h and 3a-h in good yield. In this way, all possible A-ring diastereomers were synthesized. The synthesized analogues were biologically evaluated both in vitro and in vivo. The potency was highly dependent on the stereochemistry of each isomer. In particular, the alpha alpha beta -isomer 2g exhibited 4-fold higher potency than 1 alpha ,25-dihydroxyvitamin D-3 (1) both in bovine thymus VDR binding and in elevation of rat serum calcium concentration and was twice as potent, as the parent compound in HL-60 cell differentiation. Furthermore, its 20-epimer, that is, 20epi-alpha alpha beta 3g, exhibited exceptionally high activities: 12-fold higher in VDR binding affinity, 7-fold higher in calcium mobilization, and 590-fold higher in HL-60 cell differentiation, as compared to 1 alpha ,25-dihydroxyvitamin D3 (1). Accordingly, the double modification of 2-methyl substitution and 20-epimerization resulted in unique activity profiles. Conformational analysis of the A-ring by H-1 NMR and an X-ray crystallographic analysis of the alpha alpha beta -isomer 2g are also described.

  DOI：

  10.1021/jm000261j

文献信息

• Highly potent cell differentiation-inducing analogues of 1α,25-dihydroxyvitamin D3: synthesis and biological activity of 2-methyl-1,25-dihydroxyvitamin D3 with side-chain modifications
  作者：Toshie Fujishima、Liu Zhaopeng、Katsuhiro Konno、Kimie Nakagawa、Toshio Okano、Kentaro Yamaguchi、Hiroaki Takayama

  DOI：10.1016/s0968-0896(00)00267-4

  日期：2001.2

  25-dihydroxyvitamin D3 (6: KH-1060) were convergently synthesized. Preparation of the CD-ring portions with modified side chains of 5 and 6, followed by palladium-catalyzed cross-coupling with the A-ring enyne synthons (20a-d), (3S,4S,5R)-, (3S,4R,5R)-, (3S,4S,5S)- and (3R,4R,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne, afforded two sets of four A-ring stereoisomers of 20-epi-2,22-dimethyl-1

  20-epi-22R-甲基-1α，25-二羟基维生素D3（5）和20-epi-24,26,27-trihomo-22-oxa-1alpha，25-二羟基维生素D3的八个2-甲基取代的类似物（6： KH-1060）聚合合成。制备具有5和6修饰侧链的CD环部分，然后与A环烯炔合子（20a-d），（3S，4S，5R）-，（3S，4R）进行钯催化的交叉偶联，5R）-，（3S，4S，5S）-和（3R，4R，5S）-3,5-双[（叔丁基二甲基甲硅烷基）氧基] -4-甲基辛-1-烯-7-炔基组的四个20-epi-2,22-二甲基-1,25-二羟基维生素D3（7a-d）和20-epi-24,26,27-trihomo-2-methyl-22-oxa-的A环立体异构体1,25-二羟基维生素D3（8a-d）。根据与天然激素相比对维生素D受体（VDR）的亲和力和HL-60细胞分化诱导活性的活性，评估了杂交类似物的生物学特性。
• Systematic studies on synthesis, structural elucidation, and biological evaluation of A-ring diastereomers of 2-methyl-1α,25-dihydroxyvitamin D3 and 20-epi-2-methyl-1α,25-dihydroxyvitamin D3
  作者：Hiroaki Takayama、Katsuhiro Konno、Toshie Fujishima、Shojiro Maki、Zhaopeng Liu、Daishiro Miura、Manabu Chokki、Seiichi Ishizuka、Connie Smith、Hector F. DeLuca、Kimie Nakagawa、Mayuko Kurobe、Toshio Okano

  DOI：10.1016/s0039-128x(00)00141-0

  日期：2001.3

  diastereomers of 2-methyl-1alpha,25-dihydroxyvitamin D(3) (2) and 20-epi-2-methyl-1alpha,25-dihydroxyvitamin D(3) (3) were synthesized by palladium-catalyzed coupling reaction of A-ring 'enyne' synthons with CD-ring portions. The A-ring synthons were rationally synthesized via a novel and practical route, starting with methyl (R)-(+)- and (S)-(-)-3-hydroxy-2-methyl-propionate, in good yields. X-ray

  通过钯催化合成了2-甲基-1α，25-二羟基维生素D（3）（2）和20-表-2-甲基-1α，25-二羟基维生素D（3）（3）的所有可能的A环非对映异构体。 A环“烯炔”合成子与CD环部分的偶联反应。A环合成子是通过新颖而实用的途径合理合成的，从（R）-（+）-和（S）-（-）-3-羟基-2-甲基丙酸甲酯开始，收率很高。X射线晶体学分析的2alpha-甲基-1alpha，25-二羟基维生素D（3）（2b）和构象分析的2alpha-甲基-（2b）和2beta-甲基-1alpha，25-二羟基维生素D（A环） 3）进行（2f），并对结果进行说明。如此合成的所有A环非对映异构体（2和3）均在体外和体内进行了生物学评估。生物学效力高度依赖于A环取代基的立体化学。特别是2b的维生素D受体[VDR]结合活性比天然激素高4倍，而其20受体（3b）则表现出异常高的活性，VDR结合的效力高12倍，钙动员7倍与
• EP1477483
  申请人：——

  公开号：——

  公开（公告）日：——
• Synthesis and biological activity of 2-methyl-20-epi analogues of 1α,25-dihydroxyvitamin D3
  作者：Toshie Fujishima、Zhaopeng Liu、Daishiro Miura、Manabu Chokki、Seiichi Ishizuka、Katsuhiro Konno、Hiroaki Takayama

  DOI：10.1016/s0960-894x(98)00363-1

  日期：1998.8

  Synthesis and biological evaluation of all eight possible A-ring diastereomers of 2-methyl-20-epi-1,25-dihydroxyvitamin D-3 are described. Among the analogues synthesized, 2 alpha-methyl-20-epi-1 alpha,25-dihydroxyvitamin D-3 exhibited exceptionally high potency. The double modification of 2-methyl substitution and 20-epimerization yielded analogues with unique activity profiles. (C) 1998 Elsevier Science Ltd. All rights reserved.
• Design and synthesis of potent vitamin D receptor antagonists with A-ring modifications: remarkable effects of 2α-methyl introduction on antagonistic activity
  作者：Toshie Fujishima、Yoshinori Kojima、Isao Azumaya、Atsushi Kittaka、Hiroaki Takayama

  DOI：10.1016/s0968-0896(03)00371-7

  日期：2003.8

  Novel A-ring analogues of the vitamin D receptor (VDR) antagonist (3a), ZK-159222, and its 24-epimer (3b) were convergently synthesized. Preparation of the CD-ring portions with the side chains of 3a,b, followed by palladium-catalyzed cross-coupling with the A-ring enyne precursors (15a,b), (3S,4S,5R)- and (3S,4S,5S)-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne, afforded the 2alpha-methyl-introduced analogues (4a,b) and their 3-epimers (5a,b). The biological profiles of the hybrid analogues were assessed in terms of affinity for VDR, and antagonistic activity to inhibit HL-60 cell differentiation induced by the natural hormone, 1alpha,25-dihydroxyvitamin D-3. The analogue 4a showed an approximately fivefold higher antagonistic activity compared with 3a. The 2alpha-methyl introduction into 3a increased the receptor affinity, thereby enhancing VDR antagonism. This approach to design potent antagonists based on hybridization of structural motifs in the A-ring and in the side chain may prove to be valuable. (C) 2003 Elsevier Ltd. All rights reserved.