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methylketene dimer | 476365-41-0

中文名称
——
中文别名
——
英文名称
methylketene dimer
英文别名
(3S,4Z)-4-ethylidene-3-methyloxetan-2-one
methylketene dimer化学式
CAS
476365-41-0
化学式
C6H8O2
mdl
——
分子量
112.128
InChiKey
CMSUQAHYZQWEKF-BNWFAOCJSA-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

  • 沸点:
    242.7±9.0 °C(Predicted)
  • 密度:
    1.171±0.06 g/cm3(Predicted)

计算性质

  • 辛醇/水分配系数(LogP):
    1.1
  • 重原子数:
    8
  • 可旋转键数:
    0
  • 环数:
    1.0
  • sp3杂化的碳原子比例:
    0.5
  • 拓扑面积:
    26.3
  • 氢给体数:
    0
  • 氢受体数:
    2

反应信息

  • 作为反应物:
    描述:
    methylketene dimer正丁基锂 、 zinc(II) tetrahydroborate 作用下, 以 乙醚正己烷二氯甲烷 为溶剂, 反应 1.0h, 生成 (2S,4S,3R,5R,6S)-3,5-dihydroxy-N-methoxy-N,2,4,6-tetramethylnonanamide
    参考文献:
    名称:
    Catalytic, Asymmetric Synthesis of Siphonarienal
    摘要:
    This paper describes the synthesis of the marine natural product, siphonarienal. The key step of this synthesis is an aldol reaction that constructs most of the skeleton and sets all three stereocenters of the target in one step from commercially available starting materials. Deoxygenation and chain homologation steps complete the synthesis.
    DOI:
    10.1021/jo0160367
  • 作为产物:
    描述:
    2-溴丙酰溴奎尼丁 作用下, 以55%的产率得到methylketene dimer
    参考文献:
    名称:
    帕马霉素621A的C(1)(')-C(10)(')片段的催化,不对称合成。
    摘要:
    [反应-请参见文本]本文描述了帕马霉素621A C(1)(')-C(10)(')片段的催化,不对称方法。我们以收敛的方式合成了这个部分,每个偶联伙伴最终都来自对映异构体富集的甲基乙烯酮二聚体。
    DOI:
    10.1021/ol005714t
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文献信息

  • Catalytic, Asymmetric Preparation of Ketene Dimers from Acid Chlorides
    作者:Michael A. Calter、Robert K. Orr、Wei Song
    DOI:10.1021/ol0359517
    日期:2003.11.1
    monosubstituted ketenes generated in situ from the reaction of acid chlorides and diisopropylethylamine yields ketene dimers in high yields and enantioselectivities. This reaction tolerates sterically demanding and functionally diverse substituents. Kinetic studies suggest that the rate-determining step for the reaction is the deprotonation of the acid chloride by the tertiary amine to form ketene and that the
    [反应:见正文]由金鸡纳生物碱催化的酰氯与二异丙基乙胺反应原位生成的单取代乙烯酮的二聚反应可高产率和对映选择性地生成乙烯酮二聚体。该反应可耐受空间上需要且功能多样的取代基。动力学研究表明,该反应的决定速率的步骤是叔胺使酰氯脱质子化以形成乙烯酮,而形成立体化学的步骤是将烯醇铵与乙烯酮相加。
  • Synthesis of the C21–C34-segment of the aplyronines using the dimer of methylketene
    作者:Michael A Calter、Xin Guo
    DOI:10.1016/s0040-4020(02)00723-8
    日期:2002.8
    This report describes a convergent synthesis of the C21–C34-segment of aplyronine. The starting point for both halves of this segment was the dimer of methylketene, readily available in either enantiomeric form by asymmetric catalysis. Diastereoselective reduction and functional group manipulation afforded the partners for a Wittig coupling reaction. The appropriate choice of oxygen protecting groups
    该报告描述了邻苯丙氨酸的C 21 -C 34-片段的会聚合成。该段的两半的起点是甲基烯酮的二聚体,通过不对称催化可容易地以任何一种对映体形式获得。非对映选择性还原和官能团操纵为维蒂希偶联反应提供了伙伴。氧保护基团的适当选择允许的Wittig反应来进行,和烯烃,得到C中得到的氢化21 -C 34 -synthon。
  • Catalytic, Asymmetric Synthesis and Diastereoselective Aldol Reactions of Dipropionate Equivalents
    作者:Michael A. Calter、Wei Song、Jianguang Zhou
    DOI:10.1021/jo035668l
    日期:2004.2.1
    methylketene can be conveniently prepared in one step and high enantiomeric excess from propionyl chloride, using a catalytic amount of a silylated cinchona alkaloid as a source of chirality. Opening of the dimer with a lithiated sulfonamide affords a β-ketosulfonimide, which undergoes Sn(II)-mediated aldol reactions to diastereoselectively afford the anti,syn-aldol adduct. Alternatively, reduction of the dimer
    使用催化量的甲硅烷基化的金鸡纳生物碱作为手性来源,可以方便地一步制备甲基乙烯酮的二聚体,并由丙酰氯制得高对映体过量。用锂化的磺酰胺打开二聚体得到β-酮磺酰亚胺,其经历Sn(II)介导的羟醛反应,非对映选择性地得到反式,顺式-羟醛加合物。或者,将二聚体还原为β-羟基酮,然后进行酰化,得到β-酰氧基酮,其经历非对映选择性,二烷基硼氯化物介导的醛醇缩合反应以产生抗,抗醛醇加合物。
  • One-Pot, Catalytic, Asymmetric Synthesis of Polypropionates
    作者:Michael A. Calter、Xin Guo、Wensheng Liao
    DOI:10.1021/ol015814e
    日期:2001.5.1
    [reaction: see text] The opening of methylketene dimer, followed by aldol reactions of the resulting enolate, provides a convenient access to syn,syn-dipropionate aldol adducts of a variety of aldehydes. These aldol adducts are useful precursors in the synthesis of complex polypropionates.
    [反应:见正文]甲基烯酮二聚体的打开,随后是生成的烯醇盐的醛醇缩合反应,为各种醛的顺式,正丙酸丙二醇醛醇加合物提供了便利的途径。这些羟醛加合物是合成复杂聚丙烯酸酯的有用前体。
  • First Total Synthesis of a Natural Product Containing a Chiral, β-Diketone:  Synthesis and Stereochemical Reassignment of Siphonarienedione and Siphonarienolone
    作者:Michael A. Calter、Wensheng Liao
    DOI:10.1021/ja027675h
    日期:2002.11.1
    siphonarienedione are described. The development of a stereoselective synthesis of beta-diketones facilitated the synthesis of the latter compound. The synthesis of the structures proposed for the natural products afforded compounds whose spectral data did not match those of the natural products. However, the synthesis of compounds isomeric to the proposed structures at C(4) and C(5) afforded compounds identical
    描述了 siphonarienolone 和 siphonarienedione 的第一次全合成。β-二酮立体选择性合成的发展促进了后一种化合物的合成。为天然产物提出的结构的合成提供了光谱数据与天然产物不匹配的化合物。但是,C(4) 和 C(5) 处建议的结构异构化合物的合成提供了与天然产物相同的化合物,从而重新分配了天然产物的立体化学。
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