115668-16-1

Upstream product

• 58338-00-4 1,3,3,5,5-tetraphenylpentane-1,5-dione 
• 6998-30-7 methylamine acetate 
• 86769-57-5 2,4,4,6-tetraphenyl-1,4-dihydropyridine 
• 74-88-4 methyl iodide 
• 591-51-5 phenyllithium 
• 1484-88-4 2,4,6-triphenylpyrilium perchlorate 

Downstream Products

• 142115-67-1 3,5-Dibromo-1-methyl-2,4,4,6-tetraphenyl-1,4-dihydro-pyridine 
• 142115-75-1 1-Methyl-3-nitro-2,4,4,6-tetraphenyl-1,4-dihydro-pyridine 
• 142115-73-9 1-Methyl-3,5-dinitro-2,4,4,6-tetraphenyl-1,4-dihydro-pyridine 

Relevant academic research and scientific papers

REACTION OF ORGANOLITHIUM COMPOUNDS WITH 1-SUBSTITUTED 2,4,6-TRIPHENYLPYRIDINIUM PERCHLORATES

The reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates Ia-Ic produces mixtures of 1,4-dihydropyridines IIa-IIe and 1,2-dihydropyridines IIIa-IIIe.Analogous reactions of phenylmagnesium bromide with compounds Ia-Ic proceed with very low conversions (less than 1percent).Photochromism in visible range is observed only with the compounds II which have two aromatic substituents at 4-position, whereas compounds III and IId show no visible photochromism.The molecular spectra of the compounds newly prepared are discussed.

ALKYLATION OF 2,4,4,6-TETRAPHENYL-1,4-DIHYDROPYRIDINE

A series of photochromic N-methyl derivatives IIIa-IIIh was synthesized by alkylation of 1-sodio-2,4,4,6-tetraphenyl-1,4-dihydropyridine (II) in an inert atmosphere.On the other hand, the starting material II afforded products IVa and IVb in the presence

NMR SPECTROSCOPIC INVESTIGATION OF p-SUBSTITUTED 2,4,4,6-TETRAPHENYL-1,4-DIHYDROPYRIDINES AND THEIR OXA AND THIA ANALOGUES

The 1H, 13C, 19F NMR spectra of photochromic p-substituted 2,4,4,6-tetraphenyl-1,4-dihydropyridines IIa-IIg, 1-methyl-2,4,4,6-tetraphenyl-1,4-dihydropyridines IIIa-IIIg, 2,4,4,6-tetraphenyl-4H-pyrans IVa-IVh, and 2,4,4,6-t