32092-99-2

Upstream product

• 1199-95-7 1-(trimethylstannyl)-2-phenylethyne 
• 104-87-0 4-methyl-benzaldehyde 
• 3883-13-4 2,2,2-trichloroethylbenzene 
• 4714-21-0 E-1-methyl-4-styryl-benzene 
• 1100-88-5 benzyltriphenylphosphonium chloride 
• 89530-34-7 1-phenyl-3-trimethylsilylprop-2-yn-1-ol 
• 4187-87-5 1-Phenyl-2-propyn-1-ol 
• 108-88-3 toluene 
• 100-52-7 benzaldehyde 
• 104-81-4 4-Methylbenzyl bromide 
• 21760-13-4 (E)-2-phenyl-3-p-tolylcyclopropanecarboxylic acid 
• 143959-05-1 ethyl N-nitroso-N-((E)-2-phenyl-3-p-tolylcyclopropyl)carbamate 
• 124-41-4 sodium methylate 
• 6738-06-3 phenylethynylmagnesium bromide 

Relevant academic research and scientific papers

Synthesis of allenes via gold-catalyzed intermolecular reaction of propargylic alcohols and aromatic compounds

Functionalized allenes are efficiently synthesized in moderate to high yield from gold-catalyzed intermolecular reaction of propargylic alcohols and aromatic compounds. The user-friendly process could be conducted under mild reaction conditions with easily accessible starting materials.

Silver(i)-mediated highly enantioselective synthesis of axially chiral allenes under thermal and microwave-assisted conditions

Silver(i) salts mediated stereospecific transformation of optically active propargylamines to axially chiral allenes with excellent enantioselectivities (17 examples with 96-99% ee; one substrate with 91% ee) without subsequent racemization.

Chromium-carbyne complexes: Intermediates for organic synthesis

(Chemical Equation Presented) On the same route: Chromium-carbyne complexes are readily prepared by treatment of 1,1,1-trichloromethyl reagents with chromium(II) chloride. They serve as intermediates in the selective formation of a wide variety of products, such as alkynes, alkenes, β-hydroxy ketones, aldehydes, allylic alcohols, and allenes (see scheme, E = electrophile).

The Polarized Absoption Spectrum of 1,3-Diphenyl-1,2-propadiene: Interaction between Mutually Perpendicular Equivalent ?-Electronic Systems

The polarized UV absorption spectrum of 1,3-diphenyl-1,2-propadiene (DPA) wasx measured in a stretched polymer film at 101 K, and the polarization directions of the lectronic absorption bands were determined.Pariser-Parr-Pople (PPP) calculations extended

Electron Demand in the Transition State of the Cyclopropylidene to Allene Ring Opening

The electronic structure of the transition state for the cyclopropylidene to allene conversion has been probed.The methodology involved the relative rates of ring opening vs trapping by MeOH for a series of variously substituted 2,3-diarylcyclopropylidenes.With the assumption that the rate of trapping was unaffected by substituents, a Hammett correlation was constructed.The negative value (-0.72) for ρ indicated that the carbenic center attracts electron density in the ring-opening transition state, much like the cyclopropyl cation to allyl cation transition state.Temperature-dependent studies showed that the observed preference for ring opening was driven by entropy factors.Also, using reasonable estimates for the close to diffusion-controlled trapping activation enthalpies, the derived enthalpies for ring opening were in close agreement with the best theoretical values.

Allene Synthesis via Boron-stabilised Alkenyl Carbanions

A new allene synthesis involving the boron-Wittig reaction of aldehydes with boron-stabilised carbanions is disclosed and its scope and limitations are explored.