methyl (1S,5R,6S)-bicyclo[3.1.0]hex-2-ene-6-carboxylate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: methyl (1S,5R,6S)-bicyclo[3.1.0]hex-2-ene-6-carboxylate
• 英文别名: Methylbicyclo<3.1.0>hex-2-en-6-exo-carboxylat；Endo-3-methoxycarbonyl-exo-6-methylbicyclo<3.1.0>hex-2-en
• 化学式: C₈H₁₀O₂
• 分子量: 138.166
• InChiKey: HZCNUZPULQRFDZ-RRKCRQDMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  10
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.62
• 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：

  methyl (1S,5R,6S)-bicyclo[3.1.0]hex-2-ene-6-carboxylate 在 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 生成 (1α,5α,6α)-bicyclo[3.1.0]hex-2-en-6-methanol
  参考文献：
  名称：

  溴催化的乙烯基环丙烷和乙烯基环丁烷的串联串联开环/环化反应：无金属的[3 + 2 + 1] / [4 + 2 + 1]级联反应，用于手性Synthesis的合成和计算研究

  摘要：

  我们提出通过bromenium物种催化vinylcyclopropanes（VCP）的[3 + 2 + 1]级联环化的详细研究（BR δ +  X δ - ）原位产生的，其结果在手性二环脒在合成串联一锅操作。脒的形成涉及VCP厂商与溴开环X，然后与氯胺T进行Ritter型反应，并进行串联环化反应。该反应已进一步扩展至乙烯基环丁烷体系，并涉及使用相同试剂进行的[4 + 2 + 1]级联环化。通过仔细选择VCP和VCB可以产生对映体纯形式的双环[4.3.0]-，-[4.3.1]-和-[4.4.0] idine，证明了该方法的多功能性。在实验观察和DFT计算的基础上，提出了一种合理的机制来解释产物的形成和观察到的立体选择性。我们提出在环丙烷碳上存在π稳定的均碳正离子化是高立体选择性的原因。X）。从使用可极化连续体模型（PCM）溶剂化模型的固溶相（乙腈）计算中可以清楚地看出这一点，从中发现V

  DOI：

  10.1002/chem.201103556
• 作为产物：
  描述：

  7-endo-chlorobicyclo<3.2.0>hept-2-en-6-one 在 对甲苯磺酸 、 potassium hydroxide 作用下， 以 1,4-二氧六环 、 甲醇 、 水 为溶剂， 反应 24.0h， 生成 methyl (1S,5R,6S)-bicyclo[3.1.0]hex-2-ene-6-carboxylate
  参考文献：
  名称：

  新型手性双环[3.1.0]己-2-烯烯氨基酸衍生物的合成作为药物化学中的有用合成子

  摘要：

  已开发出一种简短的新型新颖手性双环[3.1.0]己-2-烯氨基酸衍生物13和14的合成方法。关键步骤是由7,7-二氯双环[3.2.0 ]制备的exo-和内甲基双环[3.1.0]己-2-烯-6-羧酸盐8和9的立体和区域选择性烯丙基胺化。] hept-2-en-6-one（1）。这些氨基酸衍生物在药物化学中是有用的组成部分，并且可以通过使用（+）- 1或（-）- 1作为起始原料制备为手性化合物。

  DOI：

  10.1002/hlca.201500163

文献信息

• Stereoselective Synthesis of Highly Functionalized Cyclohexenes via Strong-Acid-Mediated Endocyclic C–C Bond Cleavage of Monocyclopropanated Cyclopentadienes
  作者：Sebastian Fischer、Terrence-Thang H. Nguyen、Andreas Ratzenboeck、Huw M. L. Davies、Oliver Reiser

  DOI：10.1021/acs.orglett.3c00935

  日期：2023.6.23

  A stereoselective, solvent- and metal-free endocyclic C–C bond cleavage of monocyclopropanated cyclopentadienes mediated by strong acids was developed, leading to highly functionalized six-membered carbocycles with high stereocontrol. The critical step for this ring-expansion is the formation of a cyclopropyl carbocation that undergoes endocyclic ring opening via an SN2′-type attack of various nucleophiles

  开发了一种由强酸介导的单环丙烷化环戊二烯的立体选择性、无溶剂和金属的环内 C-C 键断裂，产生具有高度立体控制的高度官能化的六元碳环。这种扩环的关键步骤是环丙基碳正离子的形成，环丙基碳正离子通过各种亲核试剂的 SN 2 ' 型攻击进行环内开环。随后的合成转化显示了所得环己烯对于合成具有非常规取代模式的新化合物的多功能性。
• Generation of [5.5.<i>n</i>] Tricyclic Ring Systems by Radical-Promoted Inter- and Intramolecular [3 + 2] Cycloadditions
  作者：Michael E. Jung、Heather L. Rayle

  DOI：10.1021/jo9706133

  日期：1997.7.1

  A new method for the synthesis of[5.5.n] tricyclic ring systems via radical fragmentation and double cyclization is described. The general process (Scheme 1) involves addition of an alkylthio radical to an alkenylcyclopropane 1 to generate the cyclopropylcarbinyl radical which opens to the homoallylic radical; this radical then adds to an alkene or alkyne radical trap to give a new alkyl radical which then adds back to the thioalkyl allylic system to generate, after loss of the alkylthio radical, the bi- or tricyclic product, 2, thus making the process analogous to a [3 + 2] cycloaddition. Thus addition of the butylthio radical (generated by photolysis of dibutyl disulfide) to the bicyclo-[3.1.0]hex-2-en-6-yl carboxylate 3 in the presence of an alkene or alkyne-either an acyclic radical trap, e.g., ethyl vinyl ether, isopropenyl acetate, methyl acrylate, or methyl propiolate, or a cyclic one, e.g., cyclopentenone, dihydrofuran, cyclopentenyl acetate, or cyclopentene-affords the desired bi- or tricyclic products 9-16 in yields of 54-88%. One can also use 6-vinylbicyclo[3.1.0]hexan-2-one (4) as the alkenylcyclopropane unit. Trapping of the radical generated by addition of butylthio radical to 4 with ethyl vinyl ether or cyclopentene affords the bi- and tricyclic products 17 and 18 in 66-68% yields. The products are formed as diastereomeric mixtures in all cases. This cyclization process can also be carried out in an intramolecular fashion, e.g., isomerization of the ketones 25 and 27 or the esters 28-30 with butylthio radical to give the tricyclic products 31-35 and 41-43. The use of dimethyl-substituted alkenes gives reasonably good diastereoselectivity favoring the cis-syn-cis isomer over the cis-anti-cis isomer, e.g., 7.5:1 for 33 over 34 and 4.2:1 for 41 over 42. The structures of the diastereomeric products were proven by comparison of the NMR spectra of the saturated analogues, which are known for the unsubstituted series and differ in their symmetry properties for the dimethyl-substituted case. These results indicate that the cyclization of a stabilized 5-hexenyl radical, e.g., 45 in Scheme 8, is reversible and leads to the most stable final product.
• Bromenium-Catalysed Tandem Ring Opening/Cyclisation of Vinylcyclopropanes and Vinylcyclobutanes: A Metal-Free [3+2+1]/[4+2+1] Cascade for the Synthesis of Chiral Amidines and Computational Investigation
  作者：Venkataraman Ganesh、Devarajulu Sureshkumar、Debasree Chanda、Srinivasan Chandrasekaran

  DOI：10.1002/chem.201103556

  日期：2012.9.24

  reaction has been further extended to vinylcyclobutane systems and involves a [4+2+1] cascade cyclisation with the same reagents. The versatility of the methodology has been demonstrated by careful choice of VCPs and VCBs to yield bicyclo[4.3.0]‐, ‐[4.3.1]‐ and ‐[4.4.0]amidines in enantiomerically pure form. On the basis of the experimental observations and DFT calculations, a reasonable mechanism has

  我们提出通过bromenium物种催化vinylcyclopropanes（VCP）的[3 + 2 + 1]级联环化的详细研究（BR δ +  X δ - ）原位产生的，其结果在手性二环脒在合成串联一锅操作。脒的形成涉及VCP厂商与溴开环X，然后与氯胺T进行Ritter型反应，并进行串联环化反应。该反应已进一步扩展至乙烯基环丁烷体系，并涉及使用相同试剂进行的[4 + 2 + 1]级联环化。通过仔细选择VCP和VCB可以产生对映体纯形式的双环[4.3.0]-，-[4.3.1]-和-[4.4.0] idine，证明了该方法的多功能性。在实验观察和DFT计算的基础上，提出了一种合理的机制来解释产物的形成和观察到的立体选择性。我们提出在环丙烷碳上存在π稳定的均碳正离子化是高立体选择性的原因。X）。从使用可极化连续体模型（PCM）溶剂化模型的固溶相（乙腈）计算中可以清楚地看出这一点，从中发现V
• Synthesis of Novel, Chiral Bicyclo[3.1.0]hex-2-ene Amino Acid Derivatives as Useful Synthons in Medicinal Chemistry
  作者：Heinz Stadler

  DOI：10.1002/hlca.201500163

  日期：2015.9

  A short and concise synthesis of novel, chiral bicyclo[3.1.0]hex‐2‐ene amino acid derivatives 13 and 14 has been developed. The key step is a stereo‐ and regioselective allylic amination of exo‐ and endo‐methyl bicyclo[3.1.0]hex‐2‐ene‐6‐carboxylates 8 and 9, which were prepared from 7,7‐dichlorobicyclo[3.2.0]hept‐2‐en‐6‐one (1). These amino acid derivatives are useful building blocks in medicinal chemistry

  已开发出一种简短的新型新颖手性双环[3.1.0]己-2-烯氨基酸衍生物13和14的合成方法。关键步骤是由7,7-二氯双环[3.2.0 ]制备的exo-和内甲基双环[3.1.0]己-2-烯-6-羧酸盐8和9的立体和区域选择性烯丙基胺化。] hept-2-en-6-one（1）。这些氨基酸衍生物在药物化学中是有用的组成部分，并且可以通过使用（+）- 1或（-）- 1作为起始原料制备为手性化合物。