56337-98-5

Upstream product

• 484-47-9 lophine 
• 555-16-8 4-nitrobenzaldehdye 
• 6067-45-4 4,4'-dinitrobenzil 
• 5496-39-9 2-(4-nitrophenyl)-4,5-diphenyl-1H-imidazole 
• 75-87-6 chloral 
• 619-73-8 4-nitrobenzyl chloride 
• 7697-37-2 nitric acid 

Downstream Products

• 7664-41-7 ammonia 
• 62-23-7 4-nitro-benzoic acid 

Relevant academic research and scientific papers

Efficient synthesis of 2,4,5-triaryl-1H-imidazoles from aromatic aldehydes with HMDS catalyzed by N-bromosaccharin (NBSa)

A one-pot efficient procedure for the synthesis of 2, 4, 5-triaryl-1H-imidazole derivatives by the reactions of hexamethyldisilazane and arylaldehydes in the presence of N-bromosaccharin (NBSa) is studied. This new method offers several advantages, such as excellent yields, easy workup, short reaction times, and simple procedure.

PHOTOPROTECTIVE COMPOSITION

The present invention relates to a composition comprising (i) a compound A that absorbs in the near visible- ultraviolet A (UVA) region and (ii) a compound B that absorbs in the ultraviolet B (UVB) region, wherein at least one of said compounds A or B is a compound of formula (I) wherein Y represents an optionally substituted aryl or styryl-aryl group, R1, R2, R3 and R4 independently of each other represent H, OH, ORa, NH2, NHRa, NRaRb, NO2 or halogen; wherein Ra and Rb independently of each other represent C1-C10 alkyl; and R5 and R6 independently of each other represent H, or alternatively R5 and R6 together form a C-C bond between the carbon atoms to which they are bound. The invention also relates to the use of said compound of formula (I) in the preparation of a photoprotective composition and to the related cosmetic treatment.

Convenient one-pot synthesis of 2,4,5-triaryl-1H-imidazoles from arylaldehydes, benzyl alcohols, or benzyl halides with HMDS in the presence of molecular iodine

A one-pot efficient procedure for the synthesis of 2,4,5-triaryl-1 H-imidazole derivatives in good to excellent yields by reaction between hexamethyldisilazane and arylaldehydes, benzyl alcohols, benzyl halides in the presence of molecular iodine has been developed. The remarkable advantages of this method are the simple workup procedure, high yields of products, and the availability of reagents.

1-Arylideneamino-2,2,2-trichloroethanols as synthetic equivalents of arylideneimines in the reaction with cyclopropenone derivatives

1-Arylideneamino-2,2,2-trichloroethanols react regiospecifically with cyclopropenones to form 2,2′-diaryl-1,1′,2,2′-tetrahydro- 3′,3′H-2,2′-bipyrrole-3,3′-diones. A new preparative method was developed for the synthesis of 1-arylideneamino-2,2,2- trichlor

One-pot synthesis of 2,4,5-triaryl-1 H -imidazoles from arylaldehydes, benzyl alcohols, or benzyl halides with hexamethyldisilazane in molten tetrabutylammonium bromide

A simple and efficient method for the synthesis of 2,4,5-triaryl-1H- imidazole derivatives in good to excellent yields by reaction between hexamethyldisilazane and arylaldehydes, benzyl alcohols, benzyl halides in molten tetrabutylammonium bromide as an inexpensive and non toxic solvent has been developed. The remarkable advantages of this method are the simple workup procedure, high yields of products, the use of an ionic liquid as a green solvent, and the availability of reagents. Georg Thieme Verlag Stuttgart - New York.

Novel charge-transfer chromophores featuring imidazole as Π-linkage

Overall 21 imidazole-based chromophores have been synthesized and fully characterized. The imidazole core was systematically substituted with donors (NMe2 and OMe) and acceptors (NO2 and CN groups) additionally separated from the imi

Preparation of p-nitrophenyl-imidazoles

A process for the preparation of imidazoles which are substituted with p-nitrophenyl in the 2- and/or 4- and/or 5-position and may carry additional substituents, by reacting imidazoles which are substituted by phenyl in the 2- and/or 4- and/or 5-position