tetramethyl-2,3,3,4 pentene-4 ol-2 | 4819-92-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tetramethyl-2,3,3,4 pentene-4 ol-2
• 英文别名: 2,3,3,4-tetramethyl-4-penten-2-ol；2,3,3,4-tetramethyl-pent-4-en-2-ol；2,3,3,4-Tetramethyl-penten-4-ol-2；2,3,3,4-Tetramethylpent-4-en-2-ol
• CAS: 4819-92-5
• 化学式: C₉H₁₈O
• 分子量: 142.241
• InChiKey: HFFXXCXFPKBQAK-UHFFFAOYSA-N

物化性质

• 沸点：
  182.7±9.0 °C(Predicted)
• 密度：
  0.838±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  10
• 可旋转键数：
  2
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  20.2
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  tetramethyl-2,3,3,4 pentene-4 ol-2 在 三氯氧磷 作用下， 以 吡啶 为溶剂， 以67%的产率得到2,3,3,4-四甲基-1,4-戊二烯
  参考文献：
  名称：

  Eilbracht, Peter; Balss, Erika; Acker, Michael, Chemische Berichte, 1985, vol. 118, # 2, p. 825 - 839

  摘要：

  DOI：
• 作为产物：
  描述：

  甲基碘化镁 、 2,2,3-trimethyl-3-butensaeure-aethylester 以 乙醚 为溶剂， 生成 tetramethyl-2,3,3,4 pentene-4 ol-2
  参考文献：
  名称：

  A radical clock investigation of microsomal cytochrome P-450 hydroxylation of hydrocarbons. Rate of oxygen rebound

  摘要：

  A number of alkyl-substituted cyclopropanes for which the rates of ring opening of the corresponding cyclopropylcarbinyl radicals have been determined (see preceding paper in this issue) have been used as substrates for hydroxylation by phenobarbital-induced, rat liver microsomal cytochrome P-450 at 37-degrees-C. Three of these compounds gave both ring-closed and ring-opened alcohols, thus allowing the rate constant, k(OH), for ''oxygen rebound'' onto the corresponding carbon-centered radicals to be determined. In particular, both trans- (1bH) and cis- (1cH) 1,2-dimethylcyclopropane gave 4-penten-2-ol (2bOH) and 2-methyl-3-buten-1-ol (3bOH) together with the corresponding trans- (1bOH) or cis-(1cOH) 2-methylcyclopropanemethanols. Of much greater importance, for both 1bH and 1cH the ratios of the yields of the secondary-to-primary ring-opened alcohols, i.e., [2bOH]/[3bOH], were the same, within experimental error as the ratio of the rates of ring opening of the corresponding trans- (1b.) and cis- (1c.) methylcyclopropylmethyl radicals in solution at 37-degrees-C. This indicates that when lb. and lc. are formed from their parent hydrocarbons by H-atom abstraction in the hydrophobic pocket of cytochrome P-450 they are not detectably constrained in their subsequent reactions by their unusual environment. From the ratio of the yields of the unrearranged alcohol to each of the rearranged alcohols we calculate k(OH) values of 1.5 and 1.6 x 10(10) s-1 for lbH as substrate and values of 1.9 and 1.8 x 10(10) s-1 for 1cH as substrate. Consistent with these values we have obtained k(OH) = 2.2 x 10(10) s-1 for bicyclo[2.1.0]pentane as substrate. Substrates such as methylcyclopropane and 1,1-dimethylcyclopropane, for which the corresponding cyclopropylmethyl radicals undergo relatively slow ring opening, yielded only the ring-closed alcohols on oxidation with cytochrome P-450. 1,1,2,2-Tetramethylcyclopropane gave only a trace of a ring-opened alcohol, corresponding to k(OH) = 2.5 x 10(11) s-1 for this substrate. Hexamethylcyclopropane gave no detectable ring-opened alcohol from which observation a limit for k(OH) > 5 X 10(11) s-1 can bc calculated. Possible explanations for the unexpected behavior of these last two, relatively bulky, substrates are discussed.

  DOI：

  10.1021/ja00015a025

文献信息

• Transposition des oxirannes-ethanols par l'intermediaire d'alcoxyetains
  作者：J.-P. Bats、J. Moulines、P. Picard、D. Leclercq

  DOI：10.1016/0040-4020(82)85161-2

  日期：1982.1

  Oxiraneethoxytributyltins prepared from the corresponding oxiraneethanols, on heating at ∼ 200° gave, after demetalation with isophthallic acid, 2-oxetanemethanols and/or 3-oxolanols. As appears from about thirty rearrangements the choice between oxetane and oxolane formation is dependent on: (1) the relative degree of substitution of the oxirane ring; cyclization occuring predominantly at the more

  由相应的环氧乙烷乙醇制备的环氧乙烷乙氧基三丁基锡，在〜200°C加热下，用间苯二酸脱金属后，得到2-氧杂环丁烷甲醇和/或3-氧杂环丁醇。从大约三十种重排中可以看出，在氧杂环丁烷和氧杂环丁烷的形成之间的选择取决于：（1）环氧乙烷环的相对取代度；环化主要发生在取代度更高的碳上；（2）当环氧乙烷环的两个末端均等地被取代时的结构；顺式该形式更适合于产生较小的环。已表明该反应在氧侵蚀位点发生构型反转。尝试在各种介质中以稀相或通过碱金属醇盐进行重排的尝试的结果支持以下结论：亲电子助剂对环氧乙烷的打开有很大贡献。可以通过容纳所有事实的推挽机构中的锡原子有效地提供这种辅助。本发明的环氧乙烷乙醇重排的方法可以为制备功能性氧杂环丁烷提供便利的途径。
• Synthesis of Prenylarenes and Related (Multisubstituted Allyl)arenes from Aryl Halides and Homoallyl Alcohols via Palladium-Catalyzed Retro-Allylation
  作者：Masayuki Iwasaki、Hideki Yorimitsu、Koichiro Oshima

  DOI：10.1246/bcsj.82.249

  日期：2009.2.15

  The reactions of aryl halides with 2,3,3-trimethyl-4-penten-2-ol in the presence of a palladium catalyst result in prenyl transfer from the alcohol to aryl halides via retro-allylation, yielding prenylarenes. Other multisubstituted allyl groups such as the 2,3-dimethyl-2-butenyl group are introduced to aromatic rings.

  芳基卤化物与 2,3,3-三甲基-4-戊烯-2-醇在钯催化剂存在下的反应导致异戊二烯基通过逆烯丙基化从醇转移到芳基卤化物，产生异戊二烯。其他多取代的烯丙基如 2,3-二甲基-2-丁烯基被引入到芳环中。
• Carless,H.A.J., Journal of the Chemical Society. Perkin transactions II, 1974, p. 834 - 842
  作者：Carless,H.A.J.

  DOI：——

  日期：——
• BATS, J. -P.;MOULINES, J.;PICARD, P.;LECLERCQ, D., TETRAHEDRON, 1982, 38, N 14, 2139-2146
  作者：BATS, J. -P.、MOULINES, J.、PICARD, P.、LECLERCQ, D.

  DOI：——

  日期：——
• EILBRACHT, P.;BALSS, E.;ACKER, M., CHEM. BER., 1985, 118, N 2, 825-839
  作者：EILBRACHT, P.、BALSS, E.、ACKER, M.

  DOI：——

  日期：——