tert-butyl((1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)but-3-en-1-yl)oxy)dimethylsilane | 148132-70-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tert-butyl((1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)but-3-en-1-yl)oxy)dimethylsilane
• 英文别名: tert-butyl-[1-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]but-3-enoxy]-dimethylsilane
• CAS: 148132-70-1
• 化学式: C₁₅H₃₀O₃Si
• 分子量: 286.487
• InChiKey: OAXXLRGWZBFRPV-ZGTCLIOFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  19
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.87
• 拓扑面积：
  27.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  tert-butyl((1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)but-3-en-1-yl)oxy)dimethylsilane 在 盐酸 、 戴斯-马丁氧化剂 、 间氯过氧苯甲酸 、 potassium hydroxide 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 水 为溶剂， 反应 55.0h， 生成 xylapyrroside B
  参考文献：
  名称：

  Xylapyrrosides A and B, two rare sugar-morpholine spiroketal pyrrole-derived alkaloids from Xylaria nigripes: isolation, complete structure elucidation, and total syntheses

  摘要：

  Two new [named xylapyrrosides A (1) and B (2)1 along with two known [pollenopyrrosides A (3) and B (=acortatarin A, 4)] naturally occurring spirocyclic pyrrole alkaloids were isolated and identified as minor components from the Et0H extract of the dried mycelia of the edible medicinal fungus Xylaria nigripes. Their structures were established by a combination of interpretation of spectroscopic data and single-crystal X-ray diffraction analyses. The isolates possess a unique tricyclic skeleton comprising a common bicyclic 2-formyl-pyrrole-fused morpholine, with a variable ketohexoside ring. This class of alkaloids is quite rare from natural sources. In this study, the total syntheses of compounds 1, 2 and 4 were successfully achieved by two alternative strategies, and three new analogs [named xylapyrrosides A(1) (1a), A(2) (1b) and B-1 (2a)] were also produced. Notably, the total synthesis of such spiroketal alkaloids with a pyranose ring (e.g.,1) was accomplished for the first time. The absolute configurations of the new isolates can be thereafter unequivocally secured by the total syntheses. The above isolated and synthesized spiro-alkaloids were found to show moderate antioxidant effects by preventing the oxidative stress-induced cytotoxicity of A7r5 rat vascular smooth muscle cells (VSMCs). (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.06.020
• 作为产物：
  描述：

  (R)-(+)-2,2-二甲基-1,3-二氧戊环-4-甲醛 在 2,6-二甲基吡啶 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 5.0h， 生成 tert-butyl((1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)but-3-en-1-yl)oxy)dimethylsilane
  参考文献：
  名称：

  Xylapyrrosides A and B, two rare sugar-morpholine spiroketal pyrrole-derived alkaloids from Xylaria nigripes: isolation, complete structure elucidation, and total syntheses

  摘要：

  Two new [named xylapyrrosides A (1) and B (2)1 along with two known [pollenopyrrosides A (3) and B (=acortatarin A, 4)] naturally occurring spirocyclic pyrrole alkaloids were isolated and identified as minor components from the Et0H extract of the dried mycelia of the edible medicinal fungus Xylaria nigripes. Their structures were established by a combination of interpretation of spectroscopic data and single-crystal X-ray diffraction analyses. The isolates possess a unique tricyclic skeleton comprising a common bicyclic 2-formyl-pyrrole-fused morpholine, with a variable ketohexoside ring. This class of alkaloids is quite rare from natural sources. In this study, the total syntheses of compounds 1, 2 and 4 were successfully achieved by two alternative strategies, and three new analogs [named xylapyrrosides A(1) (1a), A(2) (1b) and B-1 (2a)] were also produced. Notably, the total synthesis of such spiroketal alkaloids with a pyranose ring (e.g.,1) was accomplished for the first time. The absolute configurations of the new isolates can be thereafter unequivocally secured by the total syntheses. The above isolated and synthesized spiro-alkaloids were found to show moderate antioxidant effects by preventing the oxidative stress-induced cytotoxicity of A7r5 rat vascular smooth muscle cells (VSMCs). (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.06.020

文献信息

• Chemical synthesis and characterization of duplex DNA containing a new base pair: a nondisruptive, benzofused pyrimidine analog
  作者：Marjorie S. Solomon、Paul B. Hopkins

  DOI：10.1021/jo00060a045

  日期：1993.4

  A new base pair appropriate for incorporation into B-DNA was designed with the goal of allowing fusion of a benzene substituent across the 4 and 5 carbons of a pyrimidine analog. Such a residue may have utility in the preparation of DNA duplexes bearing precisely spatially positioned and conformationally constrained unnatural substituents such as reporter groups. The design called for the incorporation of the beta-anomer of a C-linked deoxyriboside of 2-hydroxyquinoline (dQ) opposite the beta-N9 deoxyriboside of 2-aminopurine (dAP). Several duplex DNAs were synthesized containing this new base pair as well as the analog in which 2-hydroxypyridine replaces 2-hydroxyquinoline (dP). Phosphoramidites 17 and 18 were synthesized and incorporated into synthetic oligonucleotides using automated methodology. That dQ and dP had been incorporated without chemical modification was proven by enzymatic digestion of the synthetic oligonucleotides to the component nucleosides and analysis by HPLC. Native polyacrylamide gel electrophoresis revealed that admixture of complementary strands containing dP or dQ opposite dAP gave new substances with mobility comparable to a duplex DNA of the same length containing only Watson-Crick base pairs. Solution circular dichroism measurements were consistent with these substances existing in the B conformation. T(m), DELTAH, and DELTAS were measured for synthetic duplex DNAs containing pairings of dQ and dP with dAP, dA, dC, dG, and dT. Of these, duplexes in which dAP was the partner of dP or dQ were most thermodynamically stable (DELTAG 25-degrees-C) and highest melting, with T(m) values lower by 1 to 5-degrees-C than the corresponding dA.dT-containing duplex. Solution H-1 NMR measurements from delta 11-15 on an 11-mer duplex containing the dAP.dQ pair were diagnostic for the presence of 11 base pairs. The resonance for the dAP-dQ base pair was assigned on the basis of a combination of 1D NOE measurements, temperature-dependent line width, and chemical shift measurements. We conclude that dP and dQ are competent base-pairing partners for dAP in duplex DNA and are reasonable condidates for use in the design of novel base-pairing nucleoside analogs.
• Stereocontrolled syntheses of C-linked deoxyribosides of 2-hydroxypyridine and 2-hydroxyquinoline
  作者：Marjorie S. Solomon、Paul B. Hopkins

  DOI：10.1016/s0040-4039(00)92690-x

  日期：1991.7

  2'-Deoxy-C-ribosides 4 and 5 were prepared in optically active form by a route expected to be generally useful for the synthesis of the alpha- or beta-anomers of 2'-deoxy-C-ribosides. Key steps are the addition of an organometallic reagent to aldehyde 7, mesylation of the resulting alcohol, and stereospecific deprotection/cyclization to yield the 2'-deoxy-C-riboside (7 + 8 --> 9/10; 9 --> 11).