(prop-2-en-1-ylidene)cyclobutane | 61422-84-2

• 分子结构分类: 有机化合物 - 碳氢化合物 - 不饱和烃
• 英文名称: (prop-2-en-1-ylidene)cyclobutane
• 英文别名: Cyclobutane, 1-propenylidene-；prop-2-enylidenecyclobutane
• CAS: 61422-84-2
• 化学式: C₇H₁₀
• 分子量: 94.1564
• InChiKey: YQHGGJVVSMJUMW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  7
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  trimethyl-[(E)-3-[1-(4-methylphenyl)sulfonylcyclobutyl]prop-2-enyl]silane 在 四丁基氟化铵 作用下， 以 四氢呋喃 为溶剂， 以84%的产率得到(prop-2-en-1-ylidene)cyclobutane
  参考文献：
  名称：

  (E)-1-(Phenylsulfonyl)-4-(trimethylsilyl)-1-butene:  An Advantageous Synthetic Equivalent for the 1-(1,3-Butadienyl) Anion and the 1,1-(1,3-Butadienyl) Dianion

  摘要：

  The (E)-1-(arylsulfonyl)-4-(trimethylsilyl)-1-butenes 9, 25, and 26 are prepared by CuCl2-promoted and by photolytic additions of their precursor l-arylsulfonyl chlorides and bromides to 4-(trimethylsilyl)-1-butene (14) and then dehydrohalogenation of the resulting 1-(arylsulfonyl)-2-halo-4-(trimethylsilyl)butanes 15a, 15b, 23a, and 23b with KOH, LDA, or n-BuLi. Silylbutene 14 is obtained from reaction of [(trimethylsilyl)methyl]magnesium chloride (16, X = Cl) and allyl bromide (17) and better by protiodesilylations of (E)- and (Z)-1,4-bis(trimethylsilyl)-2-butenes (20) with sulfuric or trifluoroacetic acids. (Arylsulfonyl)(trimethylsilyl)-1-butenes 9, 25, and 26 are converted efficiently by LDA or n-BuLi at -78 degrees C to 1-(arylsulfonyl)-1-lithio-4-(trimethylsilyl)-1-butenes 10, 27a, and 27b, respectively. Reactions of 27a and 27b with deuterium oxide yield (E)-1-(4-chlorophenylsulfonyl)-1-deuterio-4-(trimethylsilyl)-1-butene (28a, 83%) and (E)-1-deuterio-1-(4-methylphenylsulfonyl)-4-(trimethylsilyl) 1-butene(28b, 89%), respectively. 1-Lithio derivatives 10, 27a, and 27b undergo benzylations by benzyl bromide in THF/HMPA with retention of the positions of their olefinic double bonds to give the (E)-2-(arylsulfonyl)-1-phenyl-5-(trimethylsilyl)-2-pentenes 29a, 29b, and 29c, respectively, in 84-90% yields. Of particular interest is that asa-care isomerized to their corresponding 2-(arylsulfonyl)-1-phenyl-5-(trimethylsilyl)-3-pentenes 30a-c, respectively, which then undergo conjugative eliminations df their arylsulfonyl and their trimethylsilyl groups to give (E)-5-phenyl-1,3-pentadiene (33) in 56-63% yields upon reactions with TBAF in THF at 25 degrees C. Further, 27b reacts with 1,3-dichloropropane to form 1-chloro-4-(4-methylphenylsulfonyl)-7-(trimethylsilyl)-4-heptene (35) which is cyclized by n-BuLi to 1-(4-methylphenylsulfonyl)-l-(3-(trimethylsilyl)-1-propenyl) (37, 67%). Elimination of 37 by TBAF then gives allylenecyclobutane (34, n = 3, 84%) simply. This study thus reveals that 8, 25, and 26 have outstanding potential as 1-(1,3-butadienyl) anion (7) and 1,1-(1,3-butadienyl) dianion (8) synthons.

  DOI：

  10.1021/jo970546c

文献信息

• (<i>E</i>)- and (<i>Z</i>)-1-(Phenylsulfonyl)-4-(trimethylsilyl)-2-butenes:  Synthetic Equivalents for the 1-(1,3-Butadienyl) Anion and the 1,1-(1,3-Butadienyl) Dianion
  作者：Timothy P. Meagher、Larry Yet、Chi-Nung Hsiao、Harold Shechter

  DOI：10.1021/jo970545k

  日期：1998.6.1

  (E)- and (Z)-1-(phenylsulfonyl)-4-(trimethylsilyl)-2-butenes (7 and 8) are converted by n-BuLi to (E)- and (Z)-1-lithio-1-(phenylsulfonyl)-4-(trimethylsilyl)-2-butenes (15 and 16) with retention of initial stereochemistries. Reactions of 15 and 16 with electrophiles (protio and deuterio acids, primary, secondary, and benzyl halides, chloroformates, chlorothioformates, acid chlorides, epoxides, trialkylsilyl chlorides, and triethylgermanyl chloride) in THF or THF/HMPA give the corresponding (E)- and (Z)-1-(phenylsulfonyl)-1-substituted-4-(trimethylsilyl)-2-butenes (32) with stereochemical retention. That beta,gamma-unsaturated silyl sulfones 32 are formed instead of their alpha,beta-unsaturated (conjugated) isomers are attributed to stabilizing multiple anionic and cationic hyperconjugation and to steric effects as in 29-31. Of importance in synthesis is that 32 are eliminated by TBAF at -20 to 0 degrees C, thermally, or by column chromatography to (E)- (100 to > 93%) rather than (Z)-1-substituted-1,3-butadienes (38). Further, 32 undergo conversions by n-BuLi and various alkylating agents to (unconjugated) 1-(phenylsulfonyl)-1,1-disubstituted-4-(trimethylsilyl)-2-butenes (46) with retention of stereochemistry; Eliminations of 46 by fluoride ion, acid catalysis, or heat yield 1,1-disubstituted-1,3-butadienes (53). Silyl sulfones 7 and 8 are thus synthetic equivalents for the (E)-1-(1,3-butadienyl) anion (44) and the 1,1-(1,3-butadienyl) dianion(57). Silyl sulfones 7 and 8 also undergo efficient stereospecific intramolecular conversions by n-BuLi and alpha,omega-dihalides to 1,1-cycloalka-1-(phenylsulfonyl)-4-(trimethylsilyl)-2-butenes (62 and 71) that are eliminated by fluoride ion, heat, or adsorption chromatography to 1,1-cycloalka-1,3-butadienes (72).

  (E)- 和 (Z)-1-（苯砜基）-4-（三甲基硅基）-2-丁二烯（7 和 8）通过 n-BuLi 转化为 (E)- 和 (Z)-1- Chunky -1-（苯砜基）-4-（三甲基硅基）-2-丁二烯（15 和 16），并保留了初始立体化学。15 和 16 与电rophiles（质子和 Deuterio 酸、一级、二级、苯基卤素、氯仿酸、氯砜酸、酸酐、醚、三甲基硅基氯化物和三乙基 germanium 氯化物）在 THF 或 THF/HMPA 中反应，产生对应的 (E)- 和 (Z)-1-（苯砜基）-1-取代的-4-（三甲基硅基）-2-丁二烯（32），并保留了立体化学。由于β,γ-未饱和硅基硫醇 32 比其 α,β-未饱和（共轭）异构体更稳定，是因为它们通过多个 anionic 和 cationic 力的结合。 在合成中很重要的是，32 可以通过 TBAF 在 -20 到 0°C 的温度下脱除，或者通过柱状色谱从 (E)-（>93% 到 100%）转化为 1-取代-1,3-丁二烯（38）。此外，32 还可以通过 n-BuLi 和各种烷化剂转化为（非共轭）1-（苯基硫醇）-1,1-双取代的-4-（三甲基硅基）-2-丁二烯（46），保留立体化学。46 消除后通过氟离子、酸性催化或加热产生 1,1-取代-1,3-丁二烯（53）。 因此，7 和 8 的硅基硫醇是生成（E）-1-（1,3-丁二烯基）阴离子（44）和 1,1-（1,3-丁二烯基）二阴离子（57）的合成等效物。此外，7 和 8 还在 n-BuLi 和 alpha,omega-二卤物的参与下发生高效的立体选择性 intramolecular 转化，生成 1,1-环状结构化的-（苯基硫醇）-4-（三甲基硅基）-2-丁二烯（62 和 71），并通过氟离子、加热或吸附色谱法消除，得到 1,1-环状结构化的-1,3-丁二烯（72）。
• Competitive 1,2-C Atom Shifts in the Strained Carbene Spiro[3.3]hept-1-ylidene Explained by Distinct Ring-Puckered Conformers
  作者：Murray G. Rosenberg、Theodor Schrievers、Udo H. Brinker

  DOI：10.1021/acs.joc.6b02445

  日期：2016.12.16

  Spiro[3.3]hept-1-ylidene is a markedly strained carbene reaction intermediate that was generated by high-vacuum flash pyrolysis (HVFP) of the corresponding p-tosylhydrazone sodium salt. Five hydrocarbons were produced from the Bamford–Stevens reactant in 82% overall yield. The carbene undergoes two [1,2]-sigmatropic rearrangements via competing 1,2-C atom shifts. Ring-contraction yields cyclopropylidenecyclobutane

  螺[3.3]庚-1-亚基是一种显着拉紧的卡宾反应中间体，由相应的对甲苯磺酰hydr钠盐的高真空闪速热解（HVFP）产生。班福德-史蒂文斯反应物生产了五种烃，总产率为82％。卡宾通过竞争性的1,2-C原子位移经历了两个[1,2]-σ重排。环收缩产生环亚丙基环丁烷，而环扩展产生双环[3.2.0]庚-1（5）-烯。尽管形成了一些1-亚甲基螺[2.3]己烷，但是环的收缩是区域特异性的。它不在HVFP条件下源自卡宾。相反，它来自化学活化的环亚丙基环丁烷的亚甲基环丙烷型重排。类似地，一些化学活化的双环[3.2.0]庚-1（5）-烯经由环的开环重排为1，2-二亚甲基环戊烷。考虑到初级产物向次级产物的转化，相对产率表明，卡宾内的环收缩比环扩展占优势6.7：1。计算化学被用来评估这些重排的结构，构象，能量，应变能，过渡态和活化能，目的是解释产物的选择性。预计双环卡宾将采用与过渡态选择有关的四个不同的几何构象
• (<i>E</i>)-1-(Phenylsulfonyl)-4-(trimethylsilyl)-1-butene:  An Advantageous Synthetic Equivalent for the 1-(1,3-Butadienyl) Anion and the 1,1-(1,3-Butadienyl) Dianion
  作者：Timothy P. Meagher、Harold Shechter

  DOI：10.1021/jo970546c

  日期：1998.6.1

  The (E)-1-(arylsulfonyl)-4-(trimethylsilyl)-1-butenes 9, 25, and 26 are prepared by CuCl2-promoted and by photolytic additions of their precursor l-arylsulfonyl chlorides and bromides to 4-(trimethylsilyl)-1-butene (14) and then dehydrohalogenation of the resulting 1-(arylsulfonyl)-2-halo-4-(trimethylsilyl)butanes 15a, 15b, 23a, and 23b with KOH, LDA, or n-BuLi. Silylbutene 14 is obtained from reaction of [(trimethylsilyl)methyl]magnesium chloride (16, X = Cl) and allyl bromide (17) and better by protiodesilylations of (E)- and (Z)-1,4-bis(trimethylsilyl)-2-butenes (20) with sulfuric or trifluoroacetic acids. (Arylsulfonyl)(trimethylsilyl)-1-butenes 9, 25, and 26 are converted efficiently by LDA or n-BuLi at -78 degrees C to 1-(arylsulfonyl)-1-lithio-4-(trimethylsilyl)-1-butenes 10, 27a, and 27b, respectively. Reactions of 27a and 27b with deuterium oxide yield (E)-1-(4-chlorophenylsulfonyl)-1-deuterio-4-(trimethylsilyl)-1-butene (28a, 83%) and (E)-1-deuterio-1-(4-methylphenylsulfonyl)-4-(trimethylsilyl) 1-butene(28b, 89%), respectively. 1-Lithio derivatives 10, 27a, and 27b undergo benzylations by benzyl bromide in THF/HMPA with retention of the positions of their olefinic double bonds to give the (E)-2-(arylsulfonyl)-1-phenyl-5-(trimethylsilyl)-2-pentenes 29a, 29b, and 29c, respectively, in 84-90% yields. Of particular interest is that asa-care isomerized to their corresponding 2-(arylsulfonyl)-1-phenyl-5-(trimethylsilyl)-3-pentenes 30a-c, respectively, which then undergo conjugative eliminations df their arylsulfonyl and their trimethylsilyl groups to give (E)-5-phenyl-1,3-pentadiene (33) in 56-63% yields upon reactions with TBAF in THF at 25 degrees C. Further, 27b reacts with 1,3-dichloropropane to form 1-chloro-4-(4-methylphenylsulfonyl)-7-(trimethylsilyl)-4-heptene (35) which is cyclized by n-BuLi to 1-(4-methylphenylsulfonyl)-l-(3-(trimethylsilyl)-1-propenyl) (37, 67%). Elimination of 37 by TBAF then gives allylenecyclobutane (34, n = 3, 84%) simply. This study thus reveals that 8, 25, and 26 have outstanding potential as 1-(1,3-butadienyl) anion (7) and 1,1-(1,3-butadienyl) dianion (8) synthons.