methyl (1S,2R,5R)-2-[(E)-3-[tert-butyl(dimethyl)silyl]oxy-2-methylprop-1-enyl]-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-methyl-1-[3-(1-methylcyclohexyl)-3-oxopropanoyl]oxycyclohex-3-ene-1-carboxylate | 147121-87-7

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: methyl (1S,2R,5R)-2-[(E)-3-[tert-butyl(dimethyl)silyl]oxy-2-methylprop-1-enyl]-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-methyl-1-[3-(1-methylcyclohexyl)-3-oxopropanoyl]oxycyclohex-3-ene-1-carboxylate
• CAS: 147121-87-7
• 化学式: C₄₆H₆₈O₇Si₂
• 分子量: 789.213
• InChiKey: YZNQNDFLPIQKQI-SPYAQFORSA-N

物化性质

• 沸点：
  717.5±60.0 °C(predicted)
• 密度：
  1.07±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  9.5
• 重原子数：
  55
• 可旋转键数：
  18
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  88.1
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  methyl (1S,2R,5R)-2-[(E)-3-[tert-butyl(dimethyl)silyl]oxy-2-methylprop-1-enyl]-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-methyl-1-[3-(1-methylcyclohexyl)-3-oxopropanoyl]oxycyclohex-3-ene-1-carboxylate 在 sodium perchlorate 、 四丙基氢氧化铵 作用下， 以 乙醚 为溶剂， 反应 23.0h， 生成 (5S,6R,9R)-6-[(E)-3-[tert-butyl(dimethyl)silyl]oxy-2-methylprop-1-enyl]-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-2-methoxy-9-methyl-3-(1-methylcyclohexanecarbonyl)-1-oxaspiro[4.5]deca-2,7-dien-4-one
  参考文献：
  名称：

  Studies on the synthesis of kijanolide: synthesis of the 2-acyl spirotetronate and investigations concerning the coupling of the top and bottom half fragments

  摘要：

  Several studies directed toward the synthesis of kijanolide are described. First, a method for synthesis of the 2-acyl spiro tetronate substructure (15,52) via a Dieckmann cyclization protocol was developed. Second, a 10-step synthesis of 7,7-dibromo-2,4-dimethyl-5-[(tert-butyldiphenylsilyl)oxy]heptenal 35 was developed, making possible the synthesis of a range of kijanolide bottom half precursors via olefination (e.g., 35 + 23 --> 38) and cross-coupling reactions (e.g., 38 --> 19). This solves the problems encountered due to the introduction of the C(7)-hydroxyl group in our previous synthesis of the kijanolide bottom half 2.2a Third, a highly efficient procedure was developed for the coupling of kijanolide top half 8 and dioxinone 38 via an acyl ketene intermediate. This is the most efficient of several methods examined for acylating the hindered tertiary hydroxyl group of 8. Attempts to perform the IMDA reaction of 46, 47 or 9 (R = SiEt3) generated in situ from coupling of 8 and the acyl ketene (20) derived from 42 were thwarted by the unexpected tendency of beta-keto esters like 47 to fragment and decarboxylate via the acyl ketene intermediate at temperatures above 115-degrees-C. 2-Acyl tetronates 53 and 54 were prepared, but these systems decomposed upon attempted IMDA cyclization at temperatures approaching 190-degrees-C.

  DOI：

  10.1021/jo00060a036
• 作为产物：
  描述：

  在 4-二甲氨基吡啶 、 N,N'-二环己基碳二亚胺 作用下， 以 二氯甲烷 、 氘代甲苯 为溶剂， 反应 32.0h， 生成 methyl (1S,2R,5R)-2-[(E)-3-[tert-butyl(dimethyl)silyl]oxy-2-methylprop-1-enyl]-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-methyl-1-[3-(1-methylcyclohexyl)-3-oxopropanoyl]oxycyclohex-3-ene-1-carboxylate
  参考文献：
  名称：

  Studies on the synthesis of kijanolide: synthesis of the 2-acyl spirotetronate and investigations concerning the coupling of the top and bottom half fragments

  摘要：

  Several studies directed toward the synthesis of kijanolide are described. First, a method for synthesis of the 2-acyl spiro tetronate substructure (15,52) via a Dieckmann cyclization protocol was developed. Second, a 10-step synthesis of 7,7-dibromo-2,4-dimethyl-5-[(tert-butyldiphenylsilyl)oxy]heptenal 35 was developed, making possible the synthesis of a range of kijanolide bottom half precursors via olefination (e.g., 35 + 23 --> 38) and cross-coupling reactions (e.g., 38 --> 19). This solves the problems encountered due to the introduction of the C(7)-hydroxyl group in our previous synthesis of the kijanolide bottom half 2.2a Third, a highly efficient procedure was developed for the coupling of kijanolide top half 8 and dioxinone 38 via an acyl ketene intermediate. This is the most efficient of several methods examined for acylating the hindered tertiary hydroxyl group of 8. Attempts to perform the IMDA reaction of 46, 47 or 9 (R = SiEt3) generated in situ from coupling of 8 and the acyl ketene (20) derived from 42 were thwarted by the unexpected tendency of beta-keto esters like 47 to fragment and decarboxylate via the acyl ketene intermediate at temperatures above 115-degrees-C. 2-Acyl tetronates 53 and 54 were prepared, but these systems decomposed upon attempted IMDA cyclization at temperatures approaching 190-degrees-C.

  DOI：

  10.1021/jo00060a036

文献信息

• Studies on the synthesis of kijanolide: synthesis of the 2-acyl spirotetronate and investigations concerning the coupling of the top and bottom half fragments
  作者：William R. Roush、Bradley B. Brown

  DOI：10.1021/jo00060a036

  日期：1993.4

  Several studies directed toward the synthesis of kijanolide are described. First, a method for synthesis of the 2-acyl spiro tetronate substructure (15,52) via a Dieckmann cyclization protocol was developed. Second, a 10-step synthesis of 7,7-dibromo-2,4-dimethyl-5-[(tert-butyldiphenylsilyl)oxy]heptenal 35 was developed, making possible the synthesis of a range of kijanolide bottom half precursors via olefination (e.g., 35 + 23 --> 38) and cross-coupling reactions (e.g., 38 --> 19). This solves the problems encountered due to the introduction of the C(7)-hydroxyl group in our previous synthesis of the kijanolide bottom half 2.2a Third, a highly efficient procedure was developed for the coupling of kijanolide top half 8 and dioxinone 38 via an acyl ketene intermediate. This is the most efficient of several methods examined for acylating the hindered tertiary hydroxyl group of 8. Attempts to perform the IMDA reaction of 46, 47 or 9 (R = SiEt3) generated in situ from coupling of 8 and the acyl ketene (20) derived from 42 were thwarted by the unexpected tendency of beta-keto esters like 47 to fragment and decarboxylate via the acyl ketene intermediate at temperatures above 115-degrees-C. 2-Acyl tetronates 53 and 54 were prepared, but these systems decomposed upon attempted IMDA cyclization at temperatures approaching 190-degrees-C.