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Upstream product

• 7385-85-5 naphthalen-2-yl tosylate 
• 799764-32-2 1-(4-methylphenylsulfenyl)naphthalen-2-ol 
• 109251-25-4 2-methoxy-1-(toluene-4-sulfonyl)-naphthalene 
• 3401-47-6 1-bromo-2-methoxynaphthalene 
• 111064-96-1 (2-methoxynaphthalen-1-yl)(p-tolyl)sulfane 
• 10486-08-5 sodium p-thiocresolate 
• 3376-24-7 N-tert-butyl-α-phenylnitrone 
• 2725-60-2 1-(p-methylphenylsulfonyl)-1-diazopropan-2-one 
• 36651-88-4 N-(4-methylphenylazo)pyrrolidine 
• 135-19-3 β-naphthol 

Relevant academic research and scientific papers

Access to 2-naphthols: Via Ru(ii)-catalyzed C-H annulation of nitrones with α-diazo sulfonyl ketones

Efficient synthesis of 2-naphthols was realized by Ru(ii)-catalyzed C-H activation of aryl nitrones and intermolecular [3+3] annulation with α-diazo sulfonyl ketones under redox-neutral conditions. Easily available α-diazo sulfonyl ketones act as a three-carbon component in the reaction.

Synthesis method of diaryl sulfone compound

The invention discloses a green synthesis method for synthesizing a diaryl sulfone compound by catalyzing three components of aryl triazene, DABCO (SO2) 2 and beta-naphthol through an iron-containing Lewis acidic ionic liquid through a one-pot method. Under the condition of 90 DEG C, an iron-containing Lewis acidic ionic liquid is used as a catalyst, aryl triazene is used as an aryl source, and DABCO (SO2) 2 is used as an SO2 source, so that the sulfonylation reaction of the C1 site of beta-naphthol is realized. The method has the advantages that the reaction is green, the operation is simple, and no additive is added; raw materials are cheap, easy to obtain, wide in source, simple to prepare and stable in structure; and the used catalyst is cheap and easily available iron ion-containing liquid, and has the advantages of simple preparation, low price, stable structure, small pollution, greenness, environmental protection and the like.

The anionic thia-Fries rearrangement of aryl triflates

Aryl triflates undergo LDA-mediated rearrangement to generate o-hydroxyaryl trifluoromethylsulfones. In some cases, partitioning between rearrangement and aryne generation can be controlled.

Thia-Fries rearrangement of aryl sulfonates in dry media under microwave activation

An AlCl3-ZnCl2 mixture supported on silica gel is found to be a new efficient medium for the thia-Fries rearrangement of aryl sulfonates in solvent-free conditions under microwave dielectric heating. (C) 2000 Elsevier Science Ltd.