28129-05-7

Basic information

• Product Name: Benzene, (1,1-diMethyl-2-propyn-1-yl)-
• Synonyms: Benzene, (1,1-diMethyl-2-propyn-1-yl)-;1-(2-methylbut-3-yn-2-yl)benzene;(2-Methylbut-3-yn-2-yl)benzene
• CAS NO: 28129-05-7
• Molecular Formula: C₁₁H₁₂
• Molecular Weight: 144.21298
• Mol File: 28129-05-7.mol
• Article Data: 4

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Benzene, (1,1-diMethyl-2-propyn-1-yl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, (1,1-diMethyl-2-propyn-1-yl)-(28129-05-7)
• EPA Substance Registry System: Benzene, (1,1-diMethyl-2-propyn-1-yl)-(28129-05-7)

Safety Data

• Hazardous Substances Data: 28129-05-7(Hazardous Substances Data)

Usage

General Description

Benzene, (1,1-diMethyl-2-propyn-1-yl)-, also known as dipropynylbenzene, is a chemical compound with the molecular formula C11H12. It is a colorless liquid with a sweet odor, and it is commonly used in the synthesis of pharmaceuticals and other organic compounds. Dipropynylbenzene is also used as a stabilizer in the production of plastics and rubbers. However, it is important to handle this compound with care, as it is flammable and can be harmful if inhaled or ingested. Additionally, prolonged exposure to dipropynylbenzene can cause irritation to the respiratory system and skin. Therefore, proper safety measures should be taken when working with this chemical.

Upstream product

• 673-32-5 1-Phenylprop-1-yne 
• 74-83-9 methyl bromide 
• 3805-10-5 2,2-(dimethyl)-2-phenylacetaldehyde 
• 90965-06-3 dimethyl 1-(1-diazo-2-oxopropyl)phosphonate 
• 1195-98-8 2-methyl-2-phenylpropionitrile 
• 127-66-2 2-Phenyl-3-butyn-2-ol 
• 6214-32-0 1-bromo-3-methylbuta-1,2-diene 
• 80-18-2 Methyl benzenesulfonate 
• 141946-94-3 2-phenyl-3-butyn-2-yl acetate 

Downstream Products

• 38634-65-0 1,1-dimethyl-1,3-dihydro-2H-inden-2-one 
• 770-85-4 2-methyl-2-phenylbutan-3-one 
• 17684-33-2 β,β-dimethyl-β-phenylpropionitrile 
• 154027-49-3 Methanesulfonic acid 5-methyl-5-phenyl-hex-3-ynyl ester 
• 154027-52-8 5-methyl-5-phenyl-3-hexyn-1-ol 

Relevant articles and documents

Dual Gold Catalysis: Synthesis of Fluorene Derivatives from Diynes

1,5-Diyne systems bearing one terminal and one benzyl- or allyl-substituted alkyne attached to an aromatic backbone were converted in the presence of a gold catalyst. In a dual gold-catalyzed process, gold vinylidenes are formed that selectively undergo formal CH insertion into the C(sp2)–H bond of the offered unsaturated systems. If H atoms are present in the propargylic position, a subsequent isomerization to the aromatic system takes place leading to 9H-fluorene and 11H-benzo[b]fluorene derivatives as final products. In the case of a quaternary carbon in the propargylic position no further aromatization is observed and 10H-benzo[b]fluorene derivatives are obtained in high yield. (Figure presented.).

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.