Related Experiment Video
Updated: May 24, 2025

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions
Published on: November 30, 2022
Heterocycles in reactions with boradigermaallyl
Ralf H Kern1, Paul L Schmiedel1, Hartmut Schubert1
1Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany. lars.wesemann@uni-tuebingen.de.
Reactions involving a unique boron compound, boradigermaallyl, with various heterocycles like thiophene and furan were studied. The boron atom inserted into these rings, leading to further reactions with the molecule.
Area of Science:
- Organoboron Chemistry
- Heterocyclic Chemistry
- Organogermanium Chemistry
Background:
- Boradigermaallyl, a molecule featuring a boron atom stabilized by two germylene ligands, presents unique reactivity.
- Heterocyclic compounds such as thiophene, furan, pyridazine, and 2,2'-bipyridine are fundamental building blocks in various chemical applications.
Purpose of the Study:
- To investigate the reactivity of boradigermaallyl with a range of nitrogen- and oxygen-containing heterocycles.
- To elucidate the reaction pathways and products formed from the interaction of boradigermaallyl with these heterocyclic systems.
Main Methods:
- Synthesis and characterization of boradigermaallyl.
- Reaction studies involving boradigermaallyl and selected heterocycles (thiophene, furan, pyridazine, 2,2'-bipyridine).
- Spectroscopic analysis (e.g., NMR, Mass Spectrometry) of reaction products.
Main Results:
- Boradigermaallyl undergoes insertion reactions with the boron atom into the thiophene, furan, pyridazine, and 2,2'-bipyridine rings.
- The initial insertion products exhibit further reactivity with the bis(germylene) moiety of the boradigermaallyl molecule, leading to complex structures.
- The specific outcome of the reaction is dependent on the nature of the heterocycle.
Conclusions:
- Boradigermaallyl serves as a versatile reagent for the functionalization of heterocyclic compounds.
- The observed insertion and subsequent reactions highlight the rich chemistry of germylene-stabilized boron compounds.
- This study opens avenues for the synthesis of novel organoboron and organogermanium compounds with potential applications in materials science and medicinal chemistry.
More Related Videos
07:06A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis
Published on: February 16, 2020
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Related Concept Videos
Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Hydroboration-Oxidation of Alkenes
Cycloaddition Reactions: MO Requirements for Thermal Activation
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Halogenation of Alkenes
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.