(3R,5S)-3,5-Bis[(tert-butyldimethylsilyl)oxy]-1-ethynyl-2-methylcyclohex-1-ene | 146728-45-2

• 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,5S)-3,5-Bis[(tert-butyldimethylsilyl)oxy]-1-ethynyl-2-methylcyclohex-1-ene
• 英文别名: tert-butyl-[(1R,5S)-5-[tert-butyl(dimethyl)silyl]oxy-3-ethynyl-2-methylcyclohex-2-en-1-yl]oxy-dimethylsilane
• CAS: 146728-45-2
• 化学式: C₂₁H₄₀O₂Si₂
• 分子量: 380.718
• InChiKey: HAQFXALFFCFFHG-RBUKOAKNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.51
• 重原子数：
  25
• 可旋转键数：
  7
• 环数：
  1.0
• 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,5S)-3,5-Bis[(tert-butyldimethylsilyl)oxy]-1-ethynyl-2-methylcyclohex-1-ene 在 Lindlar's catalyst 、 copper(l) iodide 、 bis(triphenylphosphine) palladium (Il) acetate 喹啉 、 sodium tetrahydroborate 、 四丁基氟化铵 、 氢气 、 戴斯-马丁氧化剂 、 二乙胺 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 N,N-二甲基甲酰胺 、 丙酮 、 乙腈 为溶剂， 反应 19.87h， 生成 (1S,3S)-5-{(Z)-2-[(1R,3aR,7aR)-1-((R)-5-Hydroxy-1,5-dimethyl-hexyl)-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-inden-4-yl]-vinyl}-4-methyl-cyclohex-4-ene-1,3-diol
  参考文献：
  名称：

  Studies of vitamin D (calciferol) and its analogs. 45. Studies on the A-ring diastereomers of 1.alpha.,25-dihydroxyvitamin D3

  摘要：

  The three A-ring diastereomers 3b (compound HL), 4a (compound HJ), and 4b (compound HH), of the steroid hormone 1alpha,25-dihydroxyvitamin D3 (1alpha,25-(OH)2-D3, 3a, compound C) have been synthesized and biologically evaluated. (R)-Carvone was converted in seven steps to the enantiomerically pure A-ring enyne 7a. Palladium-catalyzed cross-coupling of the latter with the CD-ring triflate 8 resulted in silyloxy dienyne 10, which was converted in three steps to 1beta,25-(OH)2-3-epi-D3 (4b). Oxidation of the latter with Dess-Martin reagent afforded trienone 6c, which upon reduction with sodium borohydride followed by thermolysis generated the 1alpha-epimer 4a. An identical sequence converted 1alpha,25-(OH)2-D3 to its 1beta-epimer 3b via trienone 5c. Reduction of the latter with sodium triacetoxyborohydride followed by thermal isomerization regenerated the hormone 3a. Relative competitive indices (RCls) of these analogues, which reflect their ability to bind to the chick intestinal nuclear receptor under in vitro conditions, were determined. Analogues 3b, 4a, and 4b had RCI values of 0.8 +/- 0.1 %, 24.0 +/- 4.5 %, and 0.22 +/- 0.01 %, respectively, in comparison to 1alpha,25-(OH)2-D3 whose value is 100% by definition. In addition, in vivo biological evaluation of these analogues was performed to determine their ability to induce intestinal calcium absorption (ICA) and bone calcium mobilization (BCM) in vitamin D deficient chicks. Analogue 4a was effective in stimulating ICA and BCM whereas analogues 3b and 4b exhibited little potency in eliciting these biological effects.

  DOI：

  10.1021/jo00059a048
• 作为产物：
  描述：

  (3R,5S)-3,5-diacetoxy-1-ethynyl-2-methylcyclohex-1-ene 在 咪唑 、 sodium methylate 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 生成 (3R,5S)-3,5-Bis[(tert-butyldimethylsilyl)oxy]-1-ethynyl-2-methylcyclohex-1-ene
  参考文献：
  名称：

  Studies of vitamin D (calciferol) and its analogs. 45. Studies on the A-ring diastereomers of 1.alpha.,25-dihydroxyvitamin D3

  摘要：

  The three A-ring diastereomers 3b (compound HL), 4a (compound HJ), and 4b (compound HH), of the steroid hormone 1alpha,25-dihydroxyvitamin D3 (1alpha,25-(OH)2-D3, 3a, compound C) have been synthesized and biologically evaluated. (R)-Carvone was converted in seven steps to the enantiomerically pure A-ring enyne 7a. Palladium-catalyzed cross-coupling of the latter with the CD-ring triflate 8 resulted in silyloxy dienyne 10, which was converted in three steps to 1beta,25-(OH)2-3-epi-D3 (4b). Oxidation of the latter with Dess-Martin reagent afforded trienone 6c, which upon reduction with sodium borohydride followed by thermolysis generated the 1alpha-epimer 4a. An identical sequence converted 1alpha,25-(OH)2-D3 to its 1beta-epimer 3b via trienone 5c. Reduction of the latter with sodium triacetoxyborohydride followed by thermal isomerization regenerated the hormone 3a. Relative competitive indices (RCls) of these analogues, which reflect their ability to bind to the chick intestinal nuclear receptor under in vitro conditions, were determined. Analogues 3b, 4a, and 4b had RCI values of 0.8 +/- 0.1 %, 24.0 +/- 4.5 %, and 0.22 +/- 0.01 %, respectively, in comparison to 1alpha,25-(OH)2-D3 whose value is 100% by definition. In addition, in vivo biological evaluation of these analogues was performed to determine their ability to induce intestinal calcium absorption (ICA) and bone calcium mobilization (BCM) in vitamin D deficient chicks. Analogue 4a was effective in stimulating ICA and BCM whereas analogues 3b and 4b exhibited little potency in eliciting these biological effects.

  DOI：

  10.1021/jo00059a048

文献信息

• Enantioselective Synthesis of the Enyne A-Ring Synthon of the 1α-Hydroxy Vitamins D
  作者：Kathlyn A. Parker、Apostolos Dermatakis

  DOI：10.1021/jo970957t

  日期：1997.9.1