6308-02-7

Usage

Uses

Used in Fragrance Industry:
1,1,4,4-tetramethyl-3,4-dihydronaphthalen-2(1H)-one is used as a fragrance ingredient for its woody, cedar-like scent with hints of amber and musk. It adds depth and warmth to perfumes and colognes, making it a popular choice for creating complex and sophisticated scent profiles.
Used in Perfumery:
Iso E Super is used as a base note in many popular fragrance compositions, providing a long-lasting and versatile foundation that enhances and amplifies other fragrance notes. Its ability to improve the overall scent profile makes it an indispensable component in the perfumery art.
Used in Cosmetics:
In the cosmetics industry, 1,1,4,4-tetramethyl-3,4-dihydronaphthalen-2(1H)-one is used to impart a luxurious and rich scent to various products, such as lotions, creams, and body washes. Its ability to add depth and warmth to fragrances makes it a valuable addition to the sensory experience of these products.

Upstream product

• 7446-70-0 aluminium trichloride 
• 5455-94-7 2,2,5,5-tetramethyltetrahydro-3-oxofuran 
• 71-43-2 benzene 
• 154866-26-9 2-(chloromethylidene)-1,1,3,3-tetramethylindan 
• 36293-05-7 2-methyl-2-phenylpropanoyl chloride 
• 115-11-7 isobutene 

Downstream Products

• 17471-49-7 1,1,4,4-tetramethyltetralin-2,3-dione 
• 92300-81-7 β-Methyl-β-(2'-isopropyl-phenyl)-buttersaeure 
• 62157-79-3 3-Benzoyl-3-hydroxy-1,1,4,4-tetramethyl-3,4-dihydro-1H-naphthalen-2-one 
• 62157-80-6 Benzoic acid 1,1,4,4-tetramethyl-3-oxo-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 62157-76-0 4-Methyl-benzoic acid 1,1,4,4-tetramethyl-3-oxo-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 62157-75-9 3-Hydroxy-1,1,4,4-tetramethyl-3-(4-methyl-benzoyl)-3,4-dihydro-1H-naphthalen-2-one 
• 62157-82-8 4-Chloro-benzoic acid 1,1,4,4-tetramethyl-3-oxo-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 62157-81-7 3-(4-Chloro-benzoyl)-3-hydroxy-1,1,4,4-tetramethyl-3,4-dihydro-1H-naphthalen-2-one 
• 62157-77-1 3-Hydroxy-3-(4-isopropyl-benzoyl)-1,1,4,4-tetramethyl-3,4-dihydro-1H-naphthalen-2-one 
• 62157-78-2 4-Isopropyl-benzoic acid 1,1,4,4-tetramethyl-3-oxo-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 62157-73-7 3-Hydroxy-3-(4-methoxy-benzoyl)-1,1,4,4-tetramethyl-3,4-dihydro-1H-naphthalen-2-one 
• 62157-74-8 4-Methoxy-benzoic acid 1,1,4,4-tetramethyl-3-oxo-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 67756-37-0 4-Bromo-benzenesulfonic acid 1,1,4,4-tetramethyl-1,2,3,4-tetrahydro-naphthalen-2-yl ester 
• 67756-38-1 1,1,4,4-Tetramethyl-1,4-dihydronaphthalin 

Relevant academic research and scientific papers

Carbenoid-mediated nucleophilic "hydrolysis" of 2-(dichloromethylidene)-1,1,3,3-tetramethylindane with DMSO participation, affording access to one-sidedly overcrowded ketone and bromoalkene descendants

2-(Dichloromethylidene)-1,1,3,3-tetramethylindane was " hydrolyzed" by solid KOH in DMSO as the solvent at ≥100 °C through an initial chlorine particle transfer to give a Cl,K-carbenoid. This short-lived intermediate disclosed its occurrence through a reversible proton transfer which competed with an oxygen transfer from DMSO that created dimethyl sulfide. The presumably resultant transitory ketene incorporated KOH to afford the potassium salt of 1,1,3,3-tetramethylindan-2-carboxylic acid (the product of a formal hydrolysis). The lithium salt of this key acid is able to acylate aryllithium compounds, furnishing one-sidedly overcrowded ketones along with the corresponding tertiary alcohols. The latter side-products (ca. 10%) were formed against a substantially increasing repulsive resistance, as testified through the diminished rotational mobility of their aryl groups. As a less troublesome further side-product, the dianion of the above key acid was recognized through carboxylation which afforded 1,1,3,3-tetramethylindan- 2,2-dicarboxylic acid. Brominative deoxygenation of the ketones furnished two one-sidedly overcrowded bromoalkenes. Some presently relevant properties of the above Cl,K-carbenoid are provided in Supporting Information File 1.

Synthesis and oxidative behaviour of reduced indenoquinoxalines and benzophenazines

New routes to tetracyclic quinoxalines have been explored and their oxidative behaviour has been examined.Only if such compounds are devoid of benzylic hydrogen atoms are the corresponding cation radicals stable.Attempts to prepare certain polymethylated quinoxalines failed because of steric problems, and evidence is presented to show that in the case of some monohydrochloride salts proton migration between two nitrogen atoms is discernable through 1H NMR spectroscopy.

THE EFFECTS OF SUBSTITUENS AND SOLVENT POLARITY ON PHOTOCHEMICAL SIGMATROPIC SHIFTS. EXPERIMENTAL EVIDENCE IN FAVOUR OF THE OCCURRENCE OF SUDDEN POLARIZATION IN ACYCLIC ALKENES

Furher experimental evidence regarding the occurence of sudden polarization in acyclic alkenes is presented.It is shown that the yield of formation of the product derived from an intramolecular photochemical -OH shift in the 1 is dependent only on the polarity of the solvent employed.This result could be well explained in terms of a stabilization of the zwitterionic intermediate formed upon irradiation of 1 by reorientation polarization of the dipole solvent molecules.Besides this, it was found that replacement of the alkyl group at the terminal carbon atom of the C3-C9 exocyclic double bond in 1 by a phenyl substituent led to the occurence of a photochemical -H shift.This directive effect of the substituents at the exocyclic double bond could be well explained on the basis of the sudden polarization model.