(3R,5S)-3,5-diacetoxy-1-ethynyl-2-methylcyclohex-1-ene | 146698-82-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (3R,5S)-3,5-diacetoxy-1-ethynyl-2-methylcyclohex-1-ene
• 英文别名: [(1S,5R)-5-acetyloxy-3-ethynyl-4-methylcyclohex-3-en-1-yl] acetate
• CAS: 146698-82-0
• 化学式: C₁₃H₁₆O₄
• 分子量: 236.268
• InChiKey: DYHANSQRHXITEF-QWHCGFSZSA-N

物化性质

• 沸点：
  296.1±40.0 °C(Predicted)
• 密度：
  1.12±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (3R,5S)-3,5-diacetoxy-1-ethynyl-2-methylcyclohex-1-ene 在 sodium methylate 作用下， 以 甲醇 为溶剂， 生成 (3R,5S)-1-ethynyl-3,5-dihydroxy-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
• 作为产物：
  描述：

  (1R,2S,4R,6R)-2-Ethenyl-2-hydroxy-4-isopropenyl-1-methyl-7-oxabicyclo<4.1.0>heptane 在 四(三苯基膦)钯 吡啶 、 4-二甲氨基吡啶 、 samarium diiodide 、 4-硝基苯甲酰氯 、 臭氧 、 三乙胺 作用下， 生成 (3R,5S)-3,5-diacetoxy-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

• Studies of vitamin D (calciferol) and its analogs. 45. Studies on the A-ring diastereomers of 1.alpha.,25-dihydroxyvitamin D3
  作者：K. Raman Muralidharan、Angel R. De Lera、Shawn D. Isaeff、Anthony W. Norman、William H. Okamura

  DOI：10.1021/jo00059a048

  日期：1993.3

  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.
• Synthesis of Monoacyl A-Ring Precursors of 1α,25-Dihydroxyvitamin D₃ through Selective Enzymatic Hydrolysis
  作者：Vicente Gotor-Fernández、Miguel Ferrero、Susana Fernández、Vicente Gotor

  DOI：10.1021/jo010941+

  日期：2002.2.1

  An efficient synthesis of monoacylated 1alpha,25-dihydroxyvitamin D-3 A-ring precursors 15, 16, 18, and 19 has been described through an enzymatic hydrolysis process. Candida antarctica A lipase (CAL-A) hydrolyzes the C-5 acetate ester in trans stereoisomers 9 and 13, with complete and high selectivity, respectively. In the case of cis isomers 11 and 14, Chromobacterium viscosum lipase (CVL) is the enzyme of choice, exhibiting opposite selectivity for these two enantiomers. This lipase selectively catalyzes the hydrolysis at the C-3 acetate in diester 11 and at C-5 position in diester 14. It is noteworthy that through a hydrolysis reaction CAL-A and CVL allow the synthesis of the four A-ring monoacetylated precursors of 1alpha,25-dihydroxyvitamin D3, precursors which are complementary to those obtained by the enzymatic acylation process. In addition, with excellent yield CVL selectively hydrolyzes the C-3 chloroacetate ester instead of the C-5 acetate in diester 22, a key intermediate in the synthesis of new A-ring modified 1alpha,25-dihydroxyvitamin D3 analogues.