亚硝酸叔丁酯(TBN)与各种内部烯烃的反应不同,从而产生有趣且有用的产物。使用亚硝酸叔丁酯(TBN),喹啉和K 2 S 2 O 8可从内部烯烃中合成1,2,5-恶二唑N-氧化物(呋喃烷)。在相同的反应条件下,α,β-不饱和羧酸以及环状和无环内部烯烃都分别通过脱羧和直接硝化途径提供了硝基烯烃作为唯一产物。
Copper(I) Catalyzed Differential Peroxidation of Terminal and Internal Alkenes Using TBHP
作者:Bilal Ahmad Mir、Suresh Rajamanickam、Pakiza Begum、Bhisma K. Patel
DOI:10.1002/ejoc.201901689
日期:2020.1.16
A TBHP mediated carbonylation–peroxidation of styrene, α‐peroxidation of α‐substituted unsymmetrical internalalkenes and concurrent peroxidation–carbonylation–cycloalkylation/cycloetherifiction of internal cyclic alkene (indene) have been developed.
sp3-sp2 C-C Bond Formation via Brønsted Acid Trifluoromethanesulfonic Acid-Catalyzed Direct Coupling Reaction of Alcohols and Alkenes
作者:Hui-Lan Yue、Wei Wei、Ming-Ming Li、Yong-Rong Yang、Jian-Xin Ji
DOI:10.1002/adsc.201100262
日期:2011.11
A novel and efficient trifluoromethanesulfonic acid-catalyzed sp3-sp2 CC bond formation reaction through the direct coupling of alcohols with alkenes has been realized under mild conditions. The present protocol provides an attractive approach to a diverse range of polysubstituted olefins in good to excellent yields with high stereo- and regioselectivities.
<i>tert</i>
-Butyl Nitrite Mediated Nitro-Nitratosation of Internal Alkenes
作者:Bilal Ahmad Mir、Suresh Rajamanickam、Pakiza Begum、Bhisma K. Patel
DOI:10.1002/ejoc.202000149
日期:2020.5.10
In an oxygen atmosphere tert‐butyl nitrite (TBN) reacts with unsymmetrical internal benzylic alkenes to give nitro‐nitratosation product whereas α,β‐unsaturated carboxylic acid provides nitroalkene. In both cases the NO2 group attacks only to the β‐carbon, even though other radical co‐exists in the medium.
Calcium(II) catalyzed regioselective dehydrative cross-coupling reactions: Practical synthesis of internal alkenes and benzopyrans
作者:Srinivasarao Yaragorla、Abhishek Pareek、Ravikrishna Dada、Abdulrahman I. Almansour、Natarajan Arumugam
DOI:10.1016/j.tetlet.2016.11.027
日期:2016.12
the regioselectivesynthesis of internal alkenes through a dehydrative cross-coupling and direct coupling procedure has been described using the environmentally benign Ca(II) catalyst. Several alkenes and alcohols underwent the coupling reaction under solvent-free conditions in a short time to produce the desired alkenes. This method is further extended to show the application in the synthesis of novel
Metal-Free and Recyclable Route to Synthesize Polysubstituted Olefins<i>via</i>CC Bond Construction from Direct Dehydrative Coupling of Alcohols or Alkenes with Alcohols Catalyzed by Sulfonic Acid-Functionalized Ionic Liquids
AbstractA direct synthesis of polysubstituted olefins via construction of CC bonds, which involves the direct dehydrative coupling of alcohols or alkenes with alcohols, was realized using a series of alkanesulfonic acid group‐functionalized ionic liquids (SO3H‐functionlization ILs) without additives. The metal‐free and recyclable catalyst system avoided the disposal and neutralization of acidic catalysts after reaction and tolerated a broad range of substrates, including benzylic, allyl, propargylic, aliphatic and aromatic or aliphatic olefins. Additionally, the catalytic system was suitable for a gram‐scale preparation. Preliminary mechanistic studies indicated that the CH bond cleavage in this reaction might be involved in the rate‐determining step.magnified image