2-acetyl-3-methyl-pent-4-enoic acid methyl ester | 29149-79-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 酮酸及其衍生物
• 英文名称: 2-acetyl-3-methyl-pent-4-enoic acid methyl ester
• 英文别名: methyl 2-(methylallyl)-3-oxobutanoate；methyl 2-acetyl-3-methyl-4-pentenoate；methyl 2-acetyl-3-methylpent-4-enoate
• CAS: 29149-79-9
• 化学式: C₉H₁₄O₃
• 分子量: 170.208
• InChiKey: ANSCDTIHTJWMIP-UHFFFAOYSA-N

物化性质

• 沸点：
  205.2±20.0 °C(Predicted)
• 密度：
  0.980±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  12
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-acetyl-3-methyl-pent-4-enoic acid methyl ester 在 碘 作用下， 以 乙腈 为溶剂， 反应 1.0h， 以95%的产率得到5-Iodomethyl-2,4-dimethyl-4,5-dihydro-furan-3-carboxylic acid methyl ester
  参考文献：
  名称：

  Iodoenolcyclization of 2-Allyl Substituted b-Keto Esters under Thermodynamic Conditions

  摘要：

  An improved procedure for the synthesis of diastereo-enriched tetrasubstituted 4,5-dihydrofurans by using I-2-induced enolcyclization of beta-keto esters is reported. The reactions using I-2 in anhydrous MeCN are considered under thermodynamic control and the more stable trans isomers are preferentially produced.

  DOI：

  10.3987/com-04-10081
• 作为产物：
  描述：

  2-丁炔酸甲酯 在 sodium hydride 、 氯化铵 作用下， 生成 2-acetyl-3-methyl-pent-4-enoic acid methyl ester
  参考文献：
  名称：

  Iodoenolcyclization. III. A general approach to tetrasubstituted furans from 2-alkenyl-1,3-dicarbonyl compounds

  摘要：

  2,3,4,5-tetrasubstituted furans were easily obtained from of 2-alkenyl-1,3-dicarbonyl compounds by an efficient three steps synthesis.

  DOI：

  10.1016/0040-4039(95)01901-s

文献信息

• Copper(I) promoted CC bond forming reactions: direct activation of allyl alcohols
  作者：Jubaraj.B. Baruah、Ashoka G. Samuelson

  DOI：10.1016/0022-328x(89)87015-9

  日期：1989.2

  Allylic alcohols, acetates, carbonates and chlorides can be activated by copper(I) salts towards nucleophilic substitution by carbon nucleophiles under relatively mild conditions.

  烯丙醇，乙酸盐，碳酸盐和氯化物可以在相对温和的条件下被铜（I）盐活化，以被碳亲核试剂亲核取代。
• Reactions of allylic carbonates catalyzed by palladium, rhodium, ruthenium, molybdenum, and nickel complexes; allylation of carbonucleophiles and decarboxylation- dehydrogenation
  作者：Ichiro Minami、Isao Shimizu、Jiro Tsuji

  DOI：10.1016/0022-328x(85)80354-5

  日期：1985.11

  carbonucleophiles with allylic carbonates catalyzed by various transition metal complexes has been studied. Palladium, rhodium, ruthenium, nickel, and molybdenum complexes were found to be active catalysts. The rhodium catalyst showed a different regioselectivity from the other catalysts, the reaction can proceed without allylic rearrangement. In the absence of nucleophiles, allyl alkyl carbonates were converted into

  已经研究了各种过渡金属络合物催化的碳亲核试剂与烯丙基碳酸酯的烯丙基化。发现钯，铑，钌，镍和钼络合物是活性催化剂。铑催化剂显示出与其他催化剂不同的区域选择性，该反应可以在没有烯丙基重排的情况下进行。在不存在亲核试剂的情况下，碳酸烯丙基烷基酯通过脱羧-脱氢转化为酮。钌催化剂在该反应中活性最高。
• Allyation of carbonucleophiles with allylic carbonates under neutral conditions catalyzed by rhodium complexes
  作者：Jiro Tsuji、Ichiro Minami、Isao Shimizu

  DOI：10.1016/s0040-4039(01)81551-3

  日期：——

  Rhodium-phosphine complexes catalyze the allylation of carbonucleophiles with allylic carbonates under neutral conditions. In addition, we found unusual regioselectivity in the rhodium catalyzed allylation.

  铑-膦配合物在中性条件下催化碳亲核试剂与烯丙基碳酸酯的烯丙基化。此外，我们在铑催化的烯丙基化反应中发现了异常的区域选择性。
• Regioselective Rhodium-Catalyzed Addition of β-Keto Esters, β-Keto Amides, and 1,3-Diketones to Internal Alkynes
  作者：Thorsten M. Beck、Bernhard Breit

  DOI：10.1002/ejoc.201601230

  日期：2016.12

  The first rhodium-catalyzed regioselective addition of 1,3-dicarbonyl compounds, including β-keto esters, β-keto amides, and 1,3-diketones, to internal alkynes furnishes branched allylic compounds. By applying RhI/DPEphos/TFA as the catalytic system, aliphatic as well as aromatic internal methyl-substituted alkynes act as suitable substrates to yield valuable branched α-allylated 1,3-dicarbonyl compounds

  第一铑催化的区域选择性加入1,3-二羰基化合物，包括β酮酯，β - 酮酰胺和1,3-二酮，到内部炔烃配料支链的烯丙基化合物。通过应用 RhI/DPEphos/TFA 作为催化体系，脂肪族和芳香族内部甲基取代的炔烃作为合适的底物，以良好到优异的产率区域选择性地产生有价值的支链 α-烯丙基化 1,3-二羰基化合物。一个简单的基本皂化-脱羧程序提供了获得有价值的 γ,δ-不饱和酮的途径。该反应显示出广泛的官能团耐受性，并且两个反应伙伴的众多结构变化突出了该方法的合成潜力和灵活性。
• Palladium-catalyzed desulfinylative C–C allylation of Grignard reagents and enolates using allylsulfonyl chlorides and esters
  作者：Chandra M. Rao Volla、Srinivas Reddy Dubbaka、Pierre Vogel

  DOI：10.1016/j.tet.2008.11.007

  日期：2009.1

  (E)-but-2-enesulfonyl chlorides have been used as electrophilic partners in desulfinylative palladium-catalyzed C–C coupling with Grignard reagents and sodium salts of dimethyl malonate and methyl acetoacetate. Neopentyl alk-2-ene sulfonates can also be used as electrophilic partners in desulfinylative allylic arylations and allylic alkylations. The regioselectivity of the allylic arylation and alkylation depends

  2-甲基丙-2-烯-，丙-2-烯-，1-甲基丙-2-烯-和（E）-丁-2-烯磺酰氯已被用作脱亚磺酰基钯催化的CC的亲电子伙伴与格氏试剂和丙二酸二甲酯和乙酰乙酸甲酯的钠盐偶合。新戊基烷基-2-烯磺酸盐也可以用作脱亚磺酰基烯丙基芳基化和烯丙基烷基化中的亲电子伙伴。烯丙基芳基化和烷基化的区域选择性取决于催化剂的性质。与PdCl 2（PhCN）2一起，使用1-甲基丙-2-烯-或（E）-丁-2-烯磺酰氯以高区域选择性形成（E）-巴豆基衍生物。