E isomer of t-butyl α-(tetrahydro-2-furylidene)acetate | 98369-61-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 四氢呋喃
• 英文名称: E isomer of t-butyl α-(tetrahydro-2-furylidene)acetate
• 英文别名: (E)-2-(tert-butoxycarbonylmethylidene)tetrahydrofuran；tert-butyl (E)-2-(dihydrofuran-2(3H)-ylidene)acetate；tert-butyl (2E)-2-(oxolan-2-ylidene)acetate
• CAS: 98369-61-0
• 化学式: C₁₀H₁₆O₃
• 分子量: 184.235
• InChiKey: NKMYXGPETCHPEX-BQYQJAHWSA-N

物化性质

• 沸点：
  248.2±19.0 °C(Predicted)
• 密度：
  1.106±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.7
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  E isomer of t-butyl α-(tetrahydro-2-furylidene)acetate 在 四(三苯基膦)钯 potassium phosphate 、 N-溴代丁二酰亚胺(NBS) 作用下， 以 1,4-二氧六环 、 四氯化碳 为溶剂， 反应 9.0h， 生成 tert-butyl (E)-2-[4,5-dihydrofuran-2(3H)-ylidene]-2-(p-tolyl)acetate
  参考文献：
  名称：

  Functionalization of 2-Alkylidenetetrahydrofurans and 2-Alkylidene­pyrrolidines by Palladium(0)-Catalyzed Cross-Coupling Reactions

  摘要：

  通过环外双键的溴化和随后的钯催化的交叉偶联反应，2-亚烷基四氢呋喃和2-亚烷基吡咯烷被有效地官能化。

  DOI：

  10.1055/s-2004-830892
• 作为产物：
  描述：

  在 1,5,7-三氮杂双环[4.4.0]癸-5-烯 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以82%的产率得到E isomer of t-butyl α-(tetrahydro-2-furylidene)acetate
  参考文献：
  名称：

  炔烃的Brønsted碱催化串联异构化-Michael反应：氧杂环和氮杂环的合成

  摘要：

  利用布朗斯台德碱催化的串联炔烃异构化-迈克尔反应序列，开发了一种有效的氧杂环和氮杂环的合成方法。通过在链烯酸酯上原位产生的烯丙基上的分子内氧-迈克尔反应，制备官能化的2-亚烷基四氢呋喃。使用炔基胺，炔基酰胺和氨基甲酸酯的氮杂-迈克尔版本分别导致了哌啶，内酰胺和恶唑烷酮。该反应的对映选择性形式产生具有高对映选择性的轴向手性内酰胺。但是，某些炔烃无法完成分子内迈克尔反应，无法提供对映体富集的烯。

  DOI：

  10.1002/adsc.201000618

文献信息

• Chemoselective, Regioselective, and <i>E</i>/<i>Z</i>-Diastereoselective Synthesis of 2-Alkylidenetetrahydrofurans by Sequential Reactions of Ambident Dianions and Monoanions
  作者：Peter Langer、Esen Bellur

  DOI：10.1021/jo034966f

  日期：2003.12.1

  A number of novel beta-ketoesters were prepared by regioselective alkylation reactions of simple beta-ketoester dianions. The cyclization of the dianions of these 1,3-dicarbonyl derivatives with 1-bromo-2-chloroethane afforded a variety of 2-alkylidenetetrahydrofurans with very good regioselectivity and E/Z-diastereoselectivity. These products were deprotonated to give novel ambident carbanions. The

  通过简单的β-酮酯二价基团的区域选择性烷基化反应制备了许多新颖的β-酮酯。这些1-，3-二羰基衍生物的二价阴离子与1-溴-2-氯乙烷的环化反应提供了具有非常好的区域选择性和E / Z-非对映选择性的各种2-亚烷基四氢呋喃。这些产品被去质子化，以产生新颖的碳负离子。这些碳负离子用卤代烷进行的烷基化反应具有非常好的区域选择性和E / Z-非对映选择性，并可以方便地合成许多新的2-亚烷基四氢呋喃。
• Synthesis of Functionalized 2-Alkylidene-tetrahydrofurans Based on a [3+2] Cyclization/Bromination/Palladium(0) Cross-Coupling Strategy
  作者：Esen Bellur、Peter Langer

  DOI：10.1002/ejoc.200500422

  日期：2005.11

  The bromination of 2-alkylidene-tetrahydrofurans and 2-alkylidene-pyrrolidines — readily available through one-pot [3+2] cyclization reactions — afforded 2-alkylidene-1′-bromotetrahydrofurans, 2-alkylidene-3-bromotetrahydrofurans and 2-alkylidene-1′,3-dibromotetrahydrofurans and their pyrrolidine counterparts. 2-Alkylidene-1′-bromotetrahydrofurans were functionalized by performing Suzuki and Heck reactions

  2-亚烷基-四氢呋喃和 2-亚烷基-吡咯烷的溴化——很容易通过一锅 [3+2] 环化反应获得——得到 2-亚烷基-1'-溴四氢呋喃、2-亚烷基-3-溴四氢呋喃和 2-亚烷基-1',3-二溴四氢呋喃及其吡咯烷对应物。2-Alkylidene-1'-bromotetrahydrofurans 通过进行 Suzuki 和 Heck 反应进行功能化。2-Alkylidene-1',3-dibromotetrahydrofurans 成功地用于新型双铃木反应。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
• Efficient Synthesis of Furan-2-ylacetates, 7-(Alkoxycarbonyl)benzofurans, and 7-(Alkoxycarbonyl)-2,3-dihydrobenzofurans Based on Cyclization Reactions of Free and Masked Dianions:  A “Cyclization/Dehydrogenation” Strategy
  作者：Esen Bellur、Peter Langer

  DOI：10.1021/jo051767i

  日期：2005.11.1

  A variety of furan-2-ylacetates have been prepared by dehydrogenation of monocyclic 2-alkylidene-tetrahydrofurans, which are readily available by cyclizations of open-chained 1,3-dicarbonyl dianions with 1-bromo-2-chloroethane. 5'H-[2,3']Bifuranyl-2'-ones are available based on sequential "cyclization/dehydrogenation" reactions of alpha-acetyl-gamma-butyrolactones. A variety of 7-(alkoxycarbonyl)-benzofarans and 7-(alkoxycarbonyl)-2,3-dihydrobenzofurans were prepared by a cyclization/ dehydrogenation strategy. These reactions rely on cyclizations of 2-oxocycloalkane-1-carboxylate/derived 1,3-dicarbonyl dianions ("free dianions") or 1,3-bis-silyl enol ethers ("masked dianions") with various 1,2-dielectrophiles.
• Regio- and Diastereoselective Synthesis of 2-Alkylidenetetrahydrofurans by Domino S_N/S_N‘ and S_N/S_N Reactions of 1,3-Dicarbonyl Dianions
  作者：Peter Langer、Edith Holtz、Inass Karimé、Nehad N. R. Saleh

  DOI：10.1021/jo010303r

  日期：2001.9.1

  The domino C,O-cyclodialkylation reaction of dilithiated 1,3.-dicarbonyl compounds with 1,4-dibromo-2-butene resulted in regio- and diastereoselective formation of 2-alkylidene-5-vinyltetrahydrofurans. The cyclization of 1,3-dicarbonyl dianions with 1-bromo-2-chloroethane regio- and diastereoselectively afforded 2-alkylidenetetrahydrofurans under thermodynamic reaction control.
• Langer, Peter; Karime, Inass, Synlett, 2000, # 5, p. 743 - 745
  作者：Langer, Peter、Karime, Inass

  DOI：——

  日期：——