1-(三甲基乙酰基)咪唑 | 4195-19-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 1-(三甲基乙酰基)咪唑
• 英文名称: pivaloyl imidazole
• 英文别名: N-pivaloylimidazole；1-(Trimethylacetyl)imidazole；1-imidazol-1-yl-2,2-dimethylpropan-1-one
• CAS: 4195-19-1
• 化学式: C₈H₁₂N₂O
• 分子量: 152.196
• InChiKey: BJUOCCZDOGJHPV-UHFFFAOYSA-N

物化性质

• 熔点：
  47-52 °C(lit.)
• 沸点：
  245.7±23.0 °C(Predicted)
• 密度：
  1.02±0.1 g/cm3(Predicted)
• 闪点：
  214 °F
• 溶解度：
  氯仿（微溶）、乙酸乙酯（微溶）

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  11
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  34.9
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 危险品标志：
  Xi
• 安全说明：
  S26,S39
• 危险类别码：
  R36
• 海关编码：
  2933290090

反应信息

• 作为反应物：
  描述：

  1-(三甲基乙酰基)咪唑 在 palladium on activated charcoal 四氯化碳 、 sodium tetrahydroborate 、 叠氮基三甲基硅烷 、 氢气 、 三甲基铝 、 三乙胺 、 N,N-二异丙基乙胺 、 三苯基膦 、 cesium fluoride 作用下， 以 甲醇 、 正庚烷 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 0.5h， 生成 3-azido-1-benzyl-4-((1,1-dimethyl)ethyl)-2-azetidinone
  参考文献：
  名称：

  Enantioselective Synthesis of α-Amino Acids from N-Tosyloxy β-Lactams Derived from β-Keto Esters

  摘要：

  A novel synthetic sequence has been developed to convert simple beta-keto esters into enantiomerically enriched alpha-amino acids. The key features of this sequence include the addition of azide to the C3 position of beta-keto ester derived N-tosyloxy-beta-lactams through a concomitant nucleophilic addition/ N-O bond reduction reaction, a mild CsF-induced N1 benzylation of a-azido monocyclic beta-lactams, the preparation of alpha-keto-beta-lactams through a novel four-step sequence from the corresponding 3-azido-1-benzyl-beta-lactams, and TEMPO-mediated ring expansion of these compounds to the corresponding N-carboxy anhydrides (NCAs). In addition, the synthesis, isolation, and characterization of unusual 3-imino and 3-chloramino-beta-lactams is reported.

  DOI：

  10.1021/jo0162437
• 作为产物：
  描述：

  草酰基二咪唑 、 三甲基乙酸 以 乙腈 为溶剂， 生成 1-(三甲基乙酰基)咪唑
  参考文献：
  名称：

  Kitagawa, Tokujiro; Kuroda, Hiroko; Sasaki, Hideaki, Chemical and pharmaceutical bulletin, 1987, vol. 35, # 10, p. 4294 - 4301

  摘要：

  DOI：

文献信息

• Synthesis of S-thioacyl dithiophosphates, efficient and chemoselective thioacylating agentsProofs for the reversibility of isomerisation of anhydrides 1 to 2, melting points of amides and thioamides obtained from anhydrides 5–7 and 1H, 13C NMR and IR data of isolated anhydrides 5–7, 17 are available as supplementary data. For direct access, see http://www.rsc.org/suppdata/p1/b2/b201233b/
  作者：Leszek Doszczak、Janusz Rachon

  DOI：10.1039/b201233b

  日期：2002.5.10

  Easily available acyl dithiophosphates are not stable and isomerise reversibly to O-thioacyl monothiophosphates, especially when subjected to heating. Much slower but probably irreversible isomerisation to S-thioacyl monothiophosphates occurs. Since equilibrium states are established and S-thioacyl (mono)thiophosphates form slowly, reaction mixtures contain generally both thioacylating and acylating agents, and consequently cannot be used for efficient thioacylation. On the other hand, treatment of a mixture of isomeric anhydrides with an excess of a dithiophosphoric acid leads to exclusive formation of S-thioacyl dithiophosphates. They appear to be excellent thioacylating agents: relatively stable, inert towards water and oxygen and therefore easy to handle. Reactions with nitrogen or sulfur nucleophiles proceed very rapidly under ambient conditions, yielding respective thioacyl derivatives. Isolation of the products is very simple. Due to the low reactivity of S-thioacyl dithiophosphates towards oxygen nucleophiles they can be used for direct thioacylation of multifunctional nucleophiles with unprotected hydroxy groups. Respective thioacyl derivatives cannot readily be obtained using other methods.

  容易获得的酰基二硫代磷酸酯不稳定，特别是在加热条件下，可以可逆地异构化为O-硫代酰基单硫代磷酸酯。转变为S-硫代酰基单硫代磷酸酯的过程要慢得多，但可能是不可逆的。由于建立了平衡状态，S-硫代酰基（单）硫代磷酸酯的形成较慢，反应混合物通常既含有硫代酰化剂也含有酰化剂，因此无法用于高效的硫代酰化反应。另一方面，将异构酸酐混合物与过量的二硫代磷酸反应，会导致仅形成S-硫代酰基二硫代磷酸酯。它们似乎是非常优秀的硫代酰化剂：相对稳定，对水和氧气不敏感，因此易于处理。它们在常温下与氮或硫亲核试剂的反应非常迅速，产生相应的硫代酰基衍生物。产品的分离非常简单。由于S-硫代酰基二硫代磷酸酯对氧亲核试剂的反应性较低，因此它们可以用于直接硫代酰化多功能亲核试剂，而不需要保护羟基。使用其他方法不易获得相应的硫代酰基衍生物。
• Practical Chemoselective Acylation: Organocatalytic Chemodivergent Esterification and Amidation of Amino Alcohols with <i>N</i> ‐Carbonylimidazoles
  作者：Hope Nelson、William Richard、Hailee Brown、Abigail Medlin、Christina Light、Stephen T. Heller

  DOI：10.1002/anie.202107438

  日期：2021.10.11

  DBU-catalyzed esterification: A single esterification product was obtained from a molecule containing primary aniline, alcohol, phenol, secondary amide, and N−H indole groups. These acylation reactions are highly practical as they involve only readily available, inexpensive, and relatively safe reagents; can be performed on a multigram scale; and can be used on carboxylic acids directly by in situ formation

  化学选择性转化是高效有机合成的基石；然而，即使是简单的转化，如酰化反应，要实现这一目标也常常是一个挑战。我们报告说，N-羰基咪唑分别在吡啶鎓离子或 1,8-二氮杂双环 [5.4.0] undec-7-ene (DBU) 存在下能够催化化学发散的苯胺或醇酰化。两种酰化反应都显示出对目标基团的高而广泛的化学选择性。在 DBU 催化的酯化中观察到了前所未有的化学选择性水平：从含有伯苯胺、醇、苯酚、仲酰胺和N的分子中获得单一酯化产物-H吲哚基团。这些酰化反应非常实用，因为它们只涉及容易获得、便宜且相对安全的试剂；可以在多克规模上进行；并且可以通过原位形成酰基咪唑亲电试剂直接用于羧酸。
• Organometallic-type reactions in aqueous media mediated by indium. Allylation of acyloyl-imidazoles and pyrazoles. Regioselective synthesis of β,γ-unsaturated ketones
  作者：Vernal J. Bryan、Tak-Hang Chan

  DOI：10.1016/s0040-4039(97)01512-8

  日期：1997.9

  Indium mediated coupling of allylic bromide with acyloyl-imidazoles or pyrazoles in aqueous media gives the corresponding tertiary alcohols or ketones in good yield. The reaction provides a facile regioselective synthesis of β,γ-unsaturated ketones and its usefulness is demonstrated by the synthesis of the monoterpene artemesia ketone.

  在水性介质中，铟介导的烯丙基溴与酰基酰咪唑或吡唑的偶合以良好的收率得到相应的叔醇或酮。该反应提供了β，γ-不饱和酮的容易的区域选择性合成，并且其有效性由单萜蒿蒿酮的合成证明。
• Chemoselective acylation of 2-amino-8-quinolinol in the generation of C2-amides or C8-esters
  作者：Yongseok Park、Xiang Fei、Yue Yuan、Sanha Lee、Joonseong Hur、Sung Jean Park、Jae-Kyung Jung、Seung-Yong Seo

  DOI：10.1039/c7ra05287a

  日期：——

  Two different ways to carry out the chemoselective acylation of 2-amino-8-quinolinol with unique features to generate C2-amides or C8-esters were developed. The coupling reaction with a variety of carboxylic acids using EDCI and DMAP provided C8-ester derivatives, whereas N-heteroaromatic acids were not introduced on the C8-hydroxy group, but rather on the C2-amino group under the same conditions.

  开发了两种不同的方法来进行具有独特特征的2-氨基-8-喹啉醇的化学选择性酰化反应，以生成C2-酰胺或C8-酯。使用EDCI和DMAP与多种羧酸的偶联反应提供了C8-酯衍生物，而在相同条件下，N-杂芳族酸没有引入C8-羟基上，而是引入了C2-氨基上。为了选择性地获得C 2-酰胺，将来自2-氨基-8-喹啉醇的阴离子亲核试剂用反应性较小的酰基咪唑啉化物或酯处理。
• PHOTORESIST COMPOSITION AND METHOD FOR PRODUCING PHOTORESIST PATTERN
  申请人：ICHIKAWA Koji

  公开号：US20120270153A1

  公开（公告）日：2012-10-25

  A photoresist composition comprising (A) a resin which has an acid-labile group-containing structural unit and a lactone ring-containing structural unit, and (B) a salt represented by formula (I): wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, n represents 0 or 1, L 1 represents a single bond or a C1-C10 alkanediyl group in which a methylene group may be replaced by an oxygen atom or a carbonyl group, provided that L 1 is not a single bond when n is 0, R 1 represents a hydroxy group or a hydroxy group protected by a protecting group, and Z + represents an organic cation.

  一种包括(A)具有含酸敏感基团结构单元和含内酯环结构单元的树脂，以及(B)由式(I)表示的盐的光刻胶组合物：其中Q1和Q2分别独立表示氟原子或C1-C6全氟烷基基团，n表示0或1，L1表示单键或C1-C10脂肪二基基团，其中亚甲基基团可被氧原子或羰基取代，但当n为0时，L1不是单键，R1表示羟基或被保护基团保护的羟基，Z+表示有机阳离子。