13633-27-7

Upstream product

• 74-96-4 ethyl bromide 
• 13633-26-6 4-phenylbut-1-en-3-yne 
• 927-77-5 n-propylmagnesium bromide 
• 122044-10-4 Methanesulfinic acid (R)-1-phenyl-prop-2-ynyl ester 
• 16169-88-3 1-phenylprop-2-ynyl acetate 
• 106-94-5 propyl bromide 
• 10575-80-1 1-Bromo-1,2-hexadiene 
• 88284-48-4 2-(trimethylsilyl)phenyl trifluoromethanesulfonate 
• 693-02-7 hex-1-yne 
• 6738-06-3 phenylethynylmagnesium bromide 
• 1220698-75-8 1-phenyl-2-heptynyl formate 
• 1314716-01-2 C₂₄H₃₅N 
• 123-72-8 butyraldehyde 
• 536-74-3 phenylacetylene 

Downstream Products

• 6111-82-6 1-phenylhex-1-ene 
• 1077-16-3 hexylbenzene 
• 67590-77-6 (hex-2-enyl)benzene 
• 15325-54-9 (Z)-hex-1-en-1-ylbenzene 
• 6111-82-6 (E)-1-phenyl-1-hexene 
• 78633-32-6 (Z)-1-phenyl-2-hexene 
• 78633-31-5 (2E)-hex-2-en-1-ylbenzene 
• 1446696-24-7 (±)(E)-4,4,5,5-tetramethyl-2-(1-phenylhex-1-en-3-yl)-1,3,2-dioxaborolane 
• 1446696-32-7 C₁₈H₂₇BO₂ 
• 1451149-62-4 (E)-4-methyl-N-(1-phenylhex-1-en-3-yl)benzenesulfonamide 

Relevant academic research and scientific papers

Rhodium(III)-Catalyzed Directed C-H Dienylation of Anilides with Allenes Leads to Highly Conjugated Systems

Allenes are unique coupling partners in transition-metal-catalyzed C-H functionalization leading to a variety of products via alkenylation, allenylation, allylation, and annulation reactions. The outcome is governed by both the reactivity of the allene and the formation and stability of the organometallic intermediate. An efficient Rh(III)-catalyzed, weakly coordinating group-directed dienylation of electronically unbiased allenes is developed using an N-acyl amino acid as a ligand. Further elaboration of the dienylated products to construct polycyclic compounds is also described.

Enantioselective, Stereodivergent Hydroazidation and Hydroamination of Allenes Catalyzed by Acyclic Diaminocarbene (ADC) Gold(I) Complexes

The gold-catalyzed enantioselective hydroazidation and hydroamination reactions of allenes are presented herein. ADC gold(I) catalysts derived from BINAM were critical for achieving high levels of enantioselectivity in both transformations. The sense of enantioinduction is reversed for the two different nucleophiles, allowing access to both enantiomers of the corresponding allylic amines using the same catalyst enantiomer. Chiral allylic azides and amines are obtained by enantioselective hydroazidation and hydroamination of allenes catalyzed by acyclic diaminocarbene gold(I) catalysts derived from BINAM. The sense of enantioinduction is reversed for the two different nucleophiles, allowing easy access to both enantiomers with a single catalyst enantiomer.

Highly selective copper-catalyzed hydroboration of allenes and 1,3-dienes

The highly selective copper-catalyzed hydroboration of allenes has been developed. Allylboranes and alkenylboranes were selectively prepared by the judicious choice of catalytic species (copper hydride and boryl copper). Furthermore, two types of alkenylboranes could be selectively synthesized by the choice of an appropriate ligand. Mechanistic studies confirmed that the protonation of a (Z)-σ-allyl copper species, which was isolated and structurally characterized by single-crystal X-ray diffraction, was a key step in these reactions. Besides allenes, this method is also applicable to the selective hydroboration of 1,3-diene derivatives to afford allylboranes and homoallylboranes. Copyright

Can the Crabbé homologation be successfully applied to the synthesis of 1,3-disubstituted allenes?

The Crabbé homologation of terminal alkynes could be applied to the synthesis of 1,3-disubstituted allenes using aldehydes, N,N-dicyclohexylamine, and a catalytic amount of copper(I) iodide. The key to this success was the employment of an excess of aldeh

Selective synthesis of allenes and alkynes through ligand-controlled, palladium-catalyzed decarboxylative hydrogenolysis of propargylic formates

Ligand-controlled regioselective palladium-catalyzed decarboxylative hydrogenolysis of propargylic formates is described. A wide range of allenes and alkynes were obtained by using either 1,2-diphenylphosphinoethane (DPPE) or 1,6-bisdiphenylphosphinohexane (DPPH) as a catalyst ligand.

Generation of allenic/propargylic zirconium complexes and subsequent cross-coupling reactions: A facile synthesis of multisubstituted allenes

(Chemical Equation Presented) The β-alkoxide elimination reaction of propargylic ether with Negishi reagent leads to allenes and/or alkynes after hydrolysis. The product distribution is highly dependent on the substitution pattern of starting propargylic

Ene reaction of arynes with alkynes

Arynes, generated in situ from ortho-silylaryl triflates, undergo ene reaction with alkynes possessing propargylic hydrogen in the presence of KF/18-crown-6 in THF at room temperature to give substituted phenylallenes. Various terminal and internal alkyne

Electrolytically Induced Allene-Alkyne Isomerization

Preparative-scale electrolyses at mercury cathodes in dimethylformamide containing tetra-n-butylammonium perchlorate have revealed that 1-phenyl-1,2-hexadiene exhibits no evidence of isomerization to form 1-phenyl-1-hexyne via an electrolytically induced, base-catalyzed rearrangement; similarly, 1-phenyl-1,2-butadiene exhibits only a slight tendency (1-2percent) to form 1-phenyl-1-butyne.In contrast, voltammetric and electrolytic experiments demonstrate that isomerization of 1-phenyl-1-butyne, 1-phenyl-1-pentyne, and 1-phenyl-1-hexyne to the corresponding allenes occurs muchmore readily.Observations from several investigations show that the extent of allene-to-alkyne rearrangement increases from 1-phenyl-1,2-hexadiene to 1-phenyl-1,2-butadiene to phenylpropadiene, whereas the reverse alkyne-to-allene isomerization decreases in significance from 1-phenyl-1-hexyne to 1-phenyl-1-pentyne to 1-phenyl-1-butyne to 1-phenyl-1-propyne.Steric and electronic factors, which affect protonation of the conjugate bases of the various starting materials at acrbons 1 and 3, can be invoked to explain these trends.

Highly Stereoselective Synthesis of Chiral Alkylallenes by Organocopper(I)-Induced Anti 1,3-Substitution of Chiral Propynyl Esters

The synthesis of chiral 1,3-dialkylallenes R1CH=C=CHR2 of high enantiomeric purity, by applying homogeneous reaction between organocopper(I) reagents of type 2CuX>MgX-LiX> and chiral propynyl methanesulfonates or sulfinates at low temperatures in THF, is reported.The reactions are generally fast; typically complete conversion is obtained within a few minutes at -60 deg C.Overall, high anti stereoselectivity is observed.A plausible mechanism is put forward, and comparison is made with the stereochemistry of reactions of comparable substrates with d10 complexes, e.g. of Pd(0).

REACTIONS OF 3-ALKYL- AND 3,3-DIALKYL-1-BROMOALLENES WITH ORGANOCUPRATES: EFFECTS OF THE NATURE OF THE CUPRATE REAGENT ON THE REGIO- AND STEREOSELECTIVITY

Organocuprates induce 1,3- and direct substitution in 3-alkyl- and 3,3-dialkyl-1-bromo-1,2-dienes leading respectively to either terminal acetylenes or allenic hydrocarbons.The nature of the cuprate exerts a prominent role in determining both the regio- and the stereochemistry of these reactions.