17678-76-1

Usage

Uses

Used in Perfumery:
2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran] is used as a fragrance ingredient for its ability to add a sweet, coumarin-like scent to perfumes and other scented products. Its stability and longevity in formulations make it a valuable component in creating long-lasting fragrances.
Used in Food Industry:
In the food industry, 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran] is used as a flavoring agent. Its sweet, coumarin-like aroma is utilized to enhance the taste of various food products, and it is considered safe for use in this application.
Used in Cosmetics:
2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran] is also used in the cosmetics industry, where it serves as a fragrance ingredient in products such as lotions, creams, and other personal care items. Its sweet scent and stability contribute to the overall sensory experience of these products.
Used in Household Products:
In addition to its applications in perfumes, food, and cosmetics, 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran] is used in household products like air fresheners and cleaning agents. Its sweet, coumarin-like aroma helps to create a pleasant scent in the home, while its stability ensures that the fragrance lasts.

Upstream product

• 644-06-4 precocene II 

Relevant academic research and scientific papers

Structure of an unexpected trimer from the reaction of ageratochromene II with aluminum chloride

A new trimer from the reaction of ageratochromene [1] (6,7-dimethoxy-2,2-dimethyl-1-benzopyran) with anhydrous aluminum chloride was shown to be 3,4-dihydro-6,7-dimethoxy-2,2-dimethyl-3-(6′,7′ -dimethoxy-2′,2′-dimethyl-2H-1-benzopyran-4′-yl)-4-(3″, 4″-dih

On the facile dimerization of precocene II

The AgNO3-silica gel dimerization of precocene II (2) has been restudied in order to identify minor products. The transformation of dimer B (9) into other dimeric compounds has also been examined.

Reaction of precocene II with silica gel bound ferric chloride

The reaction of precocene II, 6,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (1) with silica gel bound ferric chloride affords the compounds (2-5), namely 1,2,10,11-tetramethoxy-5,5,7,7-tetramethyl-6,6a,6b,12b-tetrahydro-5H,7H-cyclopentabisbenzopyran (2), 6,7,6',7'-tetramethoxy-2,2,2',2'-tetramethyl-3',4'-dihydro-2H,2'Hbenzopyran> (3), 6,7,6',7'-tetramethoxy-2,2,2',2'-tetramethyl-2H,2'H--4'(3'H)-one (4) and 2,3,10,11-tetramethoxy-6,6,7,7-tetramethyl-6a,6b,12b,13a-tetrahydro-6H,7H-furo-bisbenzopyran (5).Theirstructures have been established by spectral data.The possible mode of their formation is also discussed.

Synthesis of Veprisine Dimers and the Formation of a Novel Cyclic Tetramer from Precocene I

Thermolysis of veprisine afforded vepridimerines A-D and in addition, a new dimer, vepridimerine E.The full details of the 1H and 13C NMR spectroscopic properties of vepridimerines A-E are presented.Acid treatment of veprisine gave another new dimer, diveprisine, analogous to the known precocene II dimer.Under the same conditions precocene I was transformed into a cyclic tetramer.High field NMR examination of the coumarin dimer, reported by Barnes et al. in 1963, confirmed the assigned structure.

The Dimerization of the Chromene, Precocene II

The dimerization of precocene II with different Lewis acids has been studied.Besides C22H32O6 dimeric products, two further dimers, containing a tetrahydrofuran ring, were isolated and their structures established by spectroscopic and X-ray analysis.Since the furans were formed in the presence of SiO2-AgNO3 or SiO2-FeCl3 and not with SiO2-ZnBr2, it is possible that they arise by one-electron-transfer oxidation.