2-Butynyl diazoacetate | 149815-44-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-Butynyl diazoacetate
• 英文别名: But-2-ynyl 2-diazoacetate
• CAS: 149815-44-1
• 化学式: C₆H₆N₂O₂
• 分子量: 138.126
• InChiKey: DSTDFOWMXPAMNP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  10
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  28.3
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-Butynyl diazoacetate 在 rhodium(II) acetate dimer 三乙胺 、 甲烷磺酰基叠氮化物 、 tin(ll) chloride 作用下， 以 苯 为溶剂， 反应 3.0h， 生成 1-oxo-4-methyl-6-isobutyl-1H,3H-furo<3,4-c>furan
  参考文献：
  名称：

  Rhodium(II)-catalyzed cyclization of 2-alkynyl 2-diazo-3-oxobutanoates as a method for synthesizing substituted furans

  摘要：

  A series of 2-alkynyl 2-diazo-3-oxobutanoates, when treated with a catalytic quantity of rhodium(II) acetate, were found to produce furo[3,4-c]furans in good yield. The reaction proceeds by addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to give a vinyl carbenoid which subsequently cyclizes onto the neighboring carbonyl group to produce the furan ring. In a similar manner, indeno[1,2-c]furans were produced from 2-butynyl 2-diazoarylacetates. Compounds substituted with methyl groups on the propargylic carbon atom cyclized at a slower rate. This rate diminution is attributed to the fact that the unsubstituted propargyl group can more easily achieve the required conformation for cyclization. C-H insertion was found to compete with furan formation when an alkyl group was attached to the keto functionality of the starting diazo acetoacetate. Diazo alkynyl sulfones undergo a novel oxygen transfer reaction when treated with rhodium(II) acetate at 80-degrees-C. The cyclized product is formed by sulfone oxygen attack onto the vinyl carbenoid producing a dipolar species which subsequently collapses to give the butenolide sulfoxide.

  DOI：

  10.1021/jo00053a009
• 作为产物：
  描述：

  2-Butynyl 2-diazo-3-oxobutanoate 在 四氢吡咯 作用下， 生成 2-Butynyl diazoacetate
  参考文献：
  名称：

  Stereo and electronic effects in the rhodium(II)-mediated synthesis of polycyclic lactones and lactams from .alpha.-diazo ester and amide precursors

  摘要：

  The rhodium(II) carboxylate catalyzed decomposition of several alpha-diazo esters and amides has been studied. A series of 5-keto-1-diazo acetates were prepared by acylation of alpha-hydroxy ketones using the (p-toluenesulfonyl)hydrazone of glyoxylic acid chloride. Treatment of these compounds with Rh(II) acetate afforded products derived from carbenoid insertion into solvent. When the hydrogen atom of the diazo carbon was replaced with an electron-withdrawing substituent, smooth cyclization occurred to produce a carbonyl ylide dipole which was subsequently trapped with different dipolarophiles. A series of N-alkyl-2-diazo-3-oxobutylamides, when treated with a catalytic quantity of rhodium(II) acetate, gave furo[3,4-c]furans in good yield. The reaction proceeds via addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to give a vinyl carbenoid which subsequently cyclizes onto the neighboring carbonyl group to produce the furan ring. N-Alkynyl-substituted 2-diazoacetamides were also found to cyclize onto the tethered alkyne unit. The resulting rhodium carbenoid can undergo intramolecular and bimolecular cyclopropanation depending on both electronic and conformational factors. Rotamer population of the starting diazoamide was also found to influence product distribution.

  DOI：

  10.1021/jo00069a030

文献信息

• In situ generation of nitrilium from nitrile ylide and the subsequent Mumm rearrangement: copper-catalyzed synthesis of unsymmetrical diacylglycine esters
  作者：Jijun Chen、Ying Shao、Liang Ma、Meihua Ma、Xiaobing Wan

  DOI：10.1039/c6ob02037b

  日期：——

  A novel in situ generation of nitrilium from a nitrile ylide and the subsequent Mumm rearrangement of carboxylic acid, nitrile, and diazo compounds gave various unsymmetrical diacylglycine esters in moderate to high yields. This copper-catalyzed cascade reaction enables one-pot generation of two C–N bonds, one CO bond, and one C–H bond, with nitrogen as the only byproduct. The reaction has a broad

  从腈基叶腈中原位生成新的腈以及随后的羧酸，腈和重氮化合物的Mumm重排以中等到高收率得到了各种不对称的二酰基甘氨酸酯。这种铜催化的级联反应可以一锅生成两个C–N键，一个C O键和一个C–H键，而氮是唯一的副产物。该反应具有宽泛的官能团耐受性，反应迅速，易于放大至100 mmol规模，并且对空气和湿气不敏感。
• In Situ Generation of Quinolinium Ylides from Diazo Compounds: Copper-Catalyzed Synthesis of Indolizine
  作者：Rongxiang Chen、Yanwei Zhao、Hongmei Sun、Ying Shao、Yudong Xu、Meihua Ma、Liang Ma、Xiaobing Wan

  DOI：10.1021/acs.joc.7b01042

  日期：2017.9.15

  The Cu-catalyzed three-component reaction between quinolines, diazo compounds, and alkenes has been established for direct construction of indolizine derivatives via quinolinium ylides. This methodology is distinguished by the use of a commercially inexpensive catalyst and readily available starting materials, wide substrate scope, and operational simplicity.

  已经建立了喹啉，重氮化合物和烯烃之间的Cu催化的三组分反应，用于通过喹啉鎓基团直接构建吲哚嗪衍生物。该方法的特点是使用了商业上便宜的催化剂和容易获得的起始原料，较宽的底物范围和操作简便性。
• [3 + 2] cycloaddition and subsequent oxidative dehydrogenation between alkenes and diazo compounds: a simple and direct approach to pyrazoles using TBAI/TBHP
  作者：Ying Shao、Jingjing Tong、Yanwei Zhao、Hao Zheng、Liang Ma、Meihua Ma、Xiaobing Wan

  DOI：10.1039/c6ob01522k

  日期：——

  sequential [3 + 2] cycloaddition and oxidative dehydrogenation reactions using TBHP as the primary oxidant. In comparison with previous cases toward pyrazoles from alkenes and diazo compounds, alkenes without a pre-organized leaving group were applied in this transformation. In addition, this methodology was distinguished by its broad substrate scope, commercially available inexpensive starting materials

  通过连续的[3 + 2]环加成反应和使用TBHP作为主要氧化剂的氧化脱氢反应，很好地描述了一种新颖的Bu 4 NI催化的吡唑形成反应。与以前从烯烃和重氮化合物制取吡唑的情况相比，在此转化过程中使用了没有预组织离去基团的烯烃。另外，该方法的特点是其广泛的底物范围，可商购的廉价起始原料，高原子经济性和操作简便性。
• Interception of Radicals by Molecular Oxygen and Diazo Compounds: Direct Synthesis of Oxalate Esters Using Visible-Light Catalysis
  作者：Meihua Ma、Weiwei Hao、Liang Ma、Yonggao Zheng、Pengcheng Lian、Xiaobing Wan

  DOI：10.1021/acs.orglett.8b02487

  日期：2018.9.21

  The synthesis of oxalate esters through a radical process, rather than the traditional ionic reaction, has been well developed in which the radicals induced by visible light are trapped by molecular oxygen and diazo compounds under room temperature. This reaction is operationally simple, mild, and shows broad substrate scopes in α-bromo ketones and diazo compounds.

  通过自由基方法而不是传统的离子反应的草酸酯的合成已经得到了很好的发展，其中可见光诱导的自由基在室温下被分子氧和重氮化合物捕获。该反应操作简单，温和，在α-溴代酮和重氮化合物中显示出广泛的底物范围。
• 一种制备草酸酯的方法
  申请人：苏州大学

  公开号：CN108863777B

  公开（公告）日：2021-01-12

  本发明公开了一种制备草酸酯的方法：以重氮化合物和α‑Br酮类化合物为反应底物，以O2为氧源和氧化剂，以可见光为能量来源，以有机染料为光催化剂，在有机溶剂中，经自由基历程得到草酸酯。本发明所使用的方法具有以下特点：反应更绿色环保、经济、底物普适性更广、后期官能团化更易，反应条件温和，空气中即可进行，光催化剂用量少，后处理简便。同时，本发明使用的反应物、光催化剂等原料廉价易得，反应组成合理，无需配体，原子经济性高，反应步骤少，仅需一步反应即可取得较高的产率，符合当代绿色化学和可持续发展的要求和方向，适于合成传统方法难以合成的不对称取代的草酸酯。