54646-55-8

Upstream product

• 62622-59-7 4-methyl-4-nitrocyclohexa-2,5-dien-1-one 
• 108-24-7 acetic anhydride 
• 140-39-6 1-acetoxy-4-methylbenzene 
• 119-33-5 4-methyl-2-nitrophenol 

Downstream Products

• 119-33-5 4-methyl-2-nitrophenol 
• 64-19-7 acetic acid 

Relevant academic research and scientific papers

Size-selective catalysts in five functionalized porous coordination polymers with unsaturated zinc centers

The five reported structural isomorphic porous coordination polymers (PCPs) 1-5, namely, [Zn(L)(ip) (1), Zn(L)(aip) (2), Zn(L)(hip) (3), Zn(L)(nip) (4), and Zn(L)(HBTC) (5) (L = N4,N4′-di(pyridine-4-yl)biphenyl-4,4′-dicarboxamide, H2ip = isophthalic acid, H2aip = 5-aminoisophthalic acid, H2hip = 5-hydroxyisophthalic acid, H2nip = 5-nitroisophthalic acid, H3BTC = 1,3,5-benzenetricarboxylic acid)] were used to catalyze the acetylation of phenol. All these heterogeneous catalysts exhibit good catalytic efficiency and size-selectivity toward the acetylation of phenols owing to their unsaturated metal centers, non-coordinated amide, and suitable channel size and shape. Among them, 2 displays the highest catalytic activity and excellent cooperative catalysis due to the presence of basic non-coordinated amide groups.

Bismuth Oxide Perchlorate as a Highly Efficient Catalyst for Heteroatom Acylation under Solvent-Free Conditions

Bismuth oxide perchlorate efficiently catalyzes the acetylation of structurally diverse phenols, alcohols, thiols, and amines under solvent free conditions. Sterically hindered and electron deficient phenols are acetylated in excellent yields with stoichiometric amounts of Ac2O at room temperature. Acylation of acid-sensitive alcohols is carried out efficiently without competitive side reactions. Optically active substrates are acetylated without any detrimental effect on the optical purity.

Electrostatic catalysis by ionic aggregates: Scope and limitations of Mg(ClO4)2 as acylation catalyst

Alkali and alkaline earth metal perchlorates exhibit electrostatic catalysis in the activation of anhydrides for the acylation reaction. Perchlorates with higher values of the charge-size function of the metal ion exhibit better catalytic activity following the order Mg(ClO4) 2>Ba(ClO4)2>LiClO4. Acylation of structurally diverse phenols, thiols, alcohols, and amines have been carried out with stoichiometric amounts of anhydride at room temperature under solvent free conditions in the presence of catalytic amount of Mg(ClO4) 2. Sterically hindered and electron deficient phenols are efficiently acylated. Acylation with sterically hindered anhydrides such as iso-butyric, pivalic, and benzoic anhydrides are carried out with phenols and alcohols in excellent yields. Acid-sensitive alcohols are acylated in excellent yields without any competitive side reactions.

15N Nuclear Polarisation in Nitration and Related Reactions. Part 7. The Mechanisms of Rearrangement of 4-Methyl-4-nitrocyclohexa-2,5-dienones

The rearrangement of 4-methyl-4-nitrocyclohexa-2,5-dienone to 4-methyl-2-nitrophenol has been studied in acetic anhydride at 22-37.5 deg C in the presence of varying concentrations of sulfuric acid.Similar studies have been carried out on the 15N labelled compound and on the effects of some substituents (2-Me, 3-Me, 2-NO2).During reaction, the thermal rearrangement of the labelled compound gives very strongly enhanced 15N NMR absorption signals (enhancement coefficient ca. 1000) for both the substrate and the product.For acid catalysed reaction, the enhancement coefficient of the signals is less (ca. 130) but still sufficient to indicate a homolytic reaction path.This interpretation is shown to be consistent with the properties of the radicals involved and with the substituent effects observed.

Evidence from (15)N Nuclear Polarisation on the Mechanisms of Rearrangement of Nitrocyclohexadienones

Strong (15)N nuclear polarisation is present in both the uncatalysed and acid-catalysed rearrangements of 4-methyl-4-cyclohexa-2,5-dienone but is absent from the rearrangement of 2-methyl-2-nitrocyclohexa-3,5-dienone.