43113-93-5

Usage

Preparation

Preparation by diazotization of 3-amino-5-methylaceto-phenone, followed by hydrolysis of the obtained diazonium salt (70%).

Upstream product

• 43113-92-4 5-acetyl-3-methyl-2-cyclohexen-1-one 
• 85288-59-1 1-[3-Methyl-5-(tetrahydro-pyran-2-yloxy)-phenyl]-ethanone 
• 74204-00-5 3-bromo-5-methylphenol 
• 26613-67-2 3-acetoxy-5-methyl-benzoic acid 
• 85288-58-0 1-[3-Methyl-5-(tetrahydro-pyran-2-yloxy)-phenyl]-ethanol 
• 85288-57-9 2-(3-Bromo-5-methyl-phenoxy)-tetrahydro-pyran 
• 85288-60-4 4-acetyl-4-ethoxycarbonyl-2,6-heptanedione 
• 99184-05-1 3-acetoxy-5-methyl-benzoyl chloride 

Downstream Products

• 98590-05-7 1-(3-hydroxy-5-methyl-2,4,6-trinitro-phenyl)-ethanone 
• 103440-93-3 1-(3-hydroxy-5-methyl-4-nitro-phenyl)-ethanone 
• 103440-92-2 1-(3-hydroxy-5-methyl-2-nitro-phenyl)-ethanone 

Relevant academic research and scientific papers

The phase change storage element and its manufacturing method

Disclosed are a phase change RAM device and a method for fabricating a phase change RAM device, which can efficiently lower intensity of current required for changing a phase of a phase change layer. The method includes the steps of providing a semiconductor substrate formed with an insulating interlayer including a tungsten plug, forming a first oxide layer on the semiconductor substrate, forming a pad-type bottom electrode, which makes contact with the tungsten plug, in the first oxide layer, forming a second oxide layer on the first oxide layer including the bottom electrode, and forming a porous polystyrene pattern on the second oxide layer such that a predetermined portion of the second oxide layer corresponding to a center portion of the bottom electrode is covered with the porous polystyrene pattern.

RULES FOR RING CLOSURE: APPLICATION TO INTRAMOLECULAR ALDOL CONDENSATIONS IN POLYKETONIC SUBSTRATES

An extension of the nomenclature for classifying ring closures to include intramolecular reactions of enolate anions is described, and the rules governing such cyclizations are enumerated.The syntheses of the polyketonic substrates 4-acetyl-2,6-heptanedione (11), 4-acetyl-4-methyl-2,7-octanedione (24), and 3-acetyl-3-methyl-1,6-diphenyl-1,6-heptanedione (33) were carried out, and their base-induced intramolecular aldol condensations studied.With each substrate a favored 6-(enolendo)-exo-trig cyclization to produce cyclohexenone products was the only ring forming reaction observed, this process predominating in all instances over competing disfavored 5-(enolendo)exo-trig closures, and also over other competing favored cyclizations.The identity of the cyclization product 12 derived from 11 was confirmed by aromatizing 12 to 17, and alternately synthesizing 17 from 3-bromo-5-methylphenol.