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2-甲基-2,3-戊二醇 | 7795-80-4

中文名称
2-甲基-2,3-戊二醇
中文别名
——
英文名称
2-methylpentane-2,3-diol
英文别名
2-methyl-2,3-pentanediol;2-methyl 2,3-pentandiol;2-Methyl-pentan-2,3-diol
2-甲基-2,3-戊二醇化学式
CAS
7795-80-4
化学式
C6H14O2
mdl
——
分子量
118.176
InChiKey
GSQFUEPQVUSAPE-UHFFFAOYSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

物化性质

  • 熔点:
    26.38°C (estimate)
  • 沸点:
    221.7°C (rough estimate)
  • 密度:
    0.9843 (rough estimate)

计算性质

  • 辛醇/水分配系数(LogP):
    0.4
  • 重原子数:
    8
  • 可旋转键数:
    2
  • 环数:
    0.0
  • sp3杂化的碳原子比例:
    1.0
  • 拓扑面积:
    40.5
  • 氢给体数:
    2
  • 氢受体数:
    2

SDS

SDS:929f99b9ca972612b0b97463abe16823
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反应信息

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文献信息

  • Manganese catalyzed cis-dihydroxylation of electron deficient alkenes with H2O2
    作者:Pattama Saisaha、Dirk Pijper、Ruben P. van Summeren、Rob Hoen、Christian Smit、Johannes W. de Boer、Ronald Hage、Paul L. Alsters、Ben L. Feringa、Wesley R. Browne
    DOI:10.1039/c0ob00102c
    日期:——
    A practical method for the multigram scale selective cis-dihydroxylation of electron deficient alkenes such as diethyl fumarate and N-alkyl and N-aryl-maleimides using H2O2 is described. High turnovers (>1000) can be achieved with this efficient manganese based catalyst system, prepared in situ from a manganese salt, pyridine-2-carboxylic acid, a ketone and a base, under ambient conditions. Under optimized conditions, for diethyl fumarate at least 1000 turnovers could be achieved with only 1.5 equiv. of H2O2 with d/l-diethyl tartrate (cis-diol product) as the sole product. For electron rich alkenes, such as cis-cyclooctene, this catalyst provides for efficient epoxidation.
    本文描述了一种实用方法,利用H2O2实现对多克规模电子缺失型烯烃(如富马酸二乙酯和N-烷基及N-芳基马来酰亚胺)的选择性顺式二羟基化。在该高效的锰基催化体系中,可在常温常压下,以高转化率(超过1000次)实现反应。该催化剂体系由锰盐、吡啶-2-羧酸、酮和碱在原位制备而成。在优化的条件下,富马酸二乙酯至少可实现1000次转化,仅使用1.5当量的H2O2,产物为唯一的(顺-二醇)d/l-酒石酸二乙酯。对于电子丰富的烯烃,如顺式-环辛烯,该催化剂可提供高效的环氧化作用。
  • Regioselective phosphoranylation and cyclodehydration of triols with diethoxytriphenylphosphorane
    作者:Jeffery W. Kelly、Slayton A. Evans
    DOI:10.1021/ja00284a036
    日期:1986.11
    The structures of the 2,2,2-triphenyl-1,3,2-dioxaphospholanes are readily assessed from /sup n/J/sub /sup 31/P-/sup 13/C/ (n = 2,3) coupling constants and /sup 31/P chemical shifts. Alkyl and aryl substituents attached to the dioxaphospholane ring also induce pronounced substituent shielding effects on the /sup 31/P resonance of the phospholanes. These effects are useful in corroborating the structural
    二乙氧基三苯基膦 (DTPP) 选择性地二膦酰化 1,2,4-三醇中的邻二醇官能团,提供热力学稳定的 2,2,2-三苯基-1,3,2-二氧杂膦。当经受热解条件时,这些二氧杂磷杂环戊烷分解形成瞬态甜菜碱,随后通过三苯基氧化膦的 3-exo-tet 挤出而坍塌成环氧化物。2,2,2-triphenyl-1,3,2-dioxaphospholanes 的结构很容易从 /sup n/J/sub /sup 31/P-/sup 13/C/ (n = 2,3) 耦合评估常数和 /sup 31/P 化学位移。连接到二氧杂磷杂环戊烷环上的烷基和芳基取代基也会对磷杂环戊烷的 /sup 31/P 共振产生显着的取代基屏蔽效应。这些效应有助于证实二氧正膦的结构归属。
  • Osmium-Catalyzed Dihydroxylation of Olefins Using Dioxygen or Air as the Terminal Oxidant
    作者:Christian Döbler、Gerald M. Mehltretter、Uta Sundermeier、Matthias Beller
    DOI:10.1021/ja000802u
    日期:2000.10.1
    The osmium-catalyzed dihydroxylation of various olefins using molecular oxygen or air as the stoichiometric oxidant is reported. Aromatic olefins yield the corresponding diols in good to excellent chemoselectivities under optimized pH conditions (pH = 10.4−12.0). Air can be used under moderate pressures (3−9 bar) instead of dioxygen as the reoxidant. By increasing the oxygen content of the solution
    报道了使用分子氧或空气作为化学计量氧化剂的锇催化的各种烯烃的二羟基化反应。在优化的 pH 条件(pH = 10.4-12.0)下,芳族烯烃产生具有良好至优异化学选择性的相应二醇。可以在中等压力(3-9 巴)下使用空气代替双氧作为再氧化剂。通过增加溶液的氧含量,可以在低催化剂用量(催化剂/底物=1:4000)下实现高效转化。三取代和四取代的烯烃在 pH > 11 时被氧化,以良好到非常好的产率得到相应的 1,2-二醇,而无需添加磺酰胺或其他水解剂。官能化烯烃的二羟基化研究表明,反应条件可耐受多种官能团。
  • Photochemical reaction of alcohols-I
    作者:R.Erra Balsells、A.R. Frasca
    DOI:10.1016/0040-4020(82)80003-3
    日期:1982.1
    The UV irradiation of aliphatic alcohols gave α-glycols as the principal products. The values of the dl-α-glycol ratios obtained in each example were analyzed.
    脂肪族醇的紫外线照射得到α-二醇作为主要产物。分析在每个实施例中获得的dl -α-二醇比率的值。
  • Shape selective oxidation using titanium silicates: epoxidation of dihydromyrcene and the model compounds 2-methylpent-2-ene and 3-methylpent-1-ene
    作者:Lee J. Schofield、Owain J. Kerton、Paul McMorn、Donald Bethell、Simon Ellwood、Graham J. Hutchings
    DOI:10.1039/b207425g
    日期:2002.12.6
    The regioselective epoxidation of dihydromyrcene has been studied in the presence of the titanium-containing silicates TS-1 and TiAlβ using aqueous hydrogen peroxide, tert-butyl hydroperoxide and urea–hydrogen peroxide as oxidants. Epoxides were observed with TS-1 and aqueous hydrogen peroxide, and with TiAlβ when used in conjunction with the urea–hydrogen peroxide complex and tert-butyl hydroperoxide. Epoxidation occurs exclusively at the more electron-rich double bond in the presence of both catalysts. The epoxidation of dihydromyrcene has also been studied under triphasic conditions (two immiscible liquid phases and one catalyst phase) rather than biphasic conditions (one liquid phase and one catalyst phase). The alcoholysis reaction of the resulting epoxide was found to proceed via the more stabilised cation intermediate under biphasic conditions. In contrast, alcoholysis under triphasic conditions proceeded to form both the favoured (major) and unfavoured (minor) ether alcohols in ratios up to 2 ∶ 1. Model compounds, (2-methylpent-2-ene and 3-methylpent-1-ene) which simulate the electronic environment around each of the double bonds in dihydromyrcene, have been used to study the degree of epoxidation of each double bond separately and under competitive conditions. When the model substrates are studied separately, the rate of epoxidation of the two double bonds are comparable. When the model substrates are epoxidised in a competitive manner, the electron-deficient double bond is oxidised in preference which is different to that observed for dihydromyrcene.
    二氢美克烯的选择性环氧化在含钛的硅酸盐TS-1和TiAlβ的存在下进行了研究,使用的氧化剂包括水合过氧化氢、叔丁基过氧化氢和尿素-过氧化氢复合物。在TS-1和水合过氧化氢的体系中观察到了环氧化物,在TiAlβ的体系中则需与尿素-过氧化氢复合物和叔丁基过氧化氢共同使用。环氧化反应仅在更富电子的双键上进行,在两种催化剂的存在下均为如此。二氢美克烯的环氧化反应还在三相条件下(两个不混溶的液相和一个催化剂相)进行了研究,而非在两相条件下(一个液相和一个催化剂相)。结果发现,在两相条件下生成的环氧化物的醇解反应通过更稳定的阳离子中间体进行。相比之下,在三相条件下的醇解反应则同时形成了主要( favored)和次要(unfavored)的醚醇,其比例可达2:1。为了研究每个双键的环氧化程度,使用了模拟二氢美克烯中每个双键周围电子环境的模型化合物(2-甲基戊-2-烯和3-甲基戊-1-烯),在竞争条件下分别进行了单独研究。当单独研究这些模型底物时,两个双键的环氧化速率相当。然而,在竞争性环氧化中,电子不足的双键优先被氧化,这与二氢美克烯的观察结果有所不同。
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表征谱图

  • 氢谱
    1HNMR
  • 质谱
    MS
  • 碳谱
    13CNMR
  • 红外
    IR
  • 拉曼
    Raman
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mass
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  • 峰位数据
  • 峰位匹配
  • 表征信息
Shift(ppm)
Intensity
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Assign
Shift(ppm)
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测试频率
样品用量
溶剂
溶剂用量
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