1,4-Naphthoquinone 3,5-dimethoxy-2-methyl

Other natural naphthoquinones, such as menadione, 1,4-naphthoquinone, 3-methyl-1,4-naphthoquinone and 2,3-dimethoxy-l,4-naphthoquinone... 

Thallium trinitrate oxidi2es naphthols and hydroquinone monoethers, respectively, to quinones and 4,4-diaIkoxycyclohexa-2,5-dienones, eg, 4,4-dimethoxy-2-methyl-2,5-cyclohexadienone [57197-11 -2] (108) (111,112). The yield of (108) is 89%. Because the monoacetal is easily converted to the quinone, the yield of 5-hydroxy-l,4-naphthoquinone [481-39-0] is 64%. 

Bromo-3-methyl-1,4-naphthoquinone 2-Bromo-1,4-dimethoxy-3-methylnaphthalene 88... 

Qo 2,3-dimethoxy-5-methyl-l,4-benzoquinone DCIP dichlorophenol-indophenol BQ 1,4-benzoquinone PMS phenazine methosulphate DMBQ 2,6-dimethyl-l,4-benzoquinone NQ 1,4-naphthoquinone VK3 2-methyl-1,4-naphthoquinone (vitamin K3). 

Carbonyl azides react with alcoholic hydroxy compounds to form the corresponding urethanes. In the same manner, ferrocenoyl azide, and 3-fe-rrocenylpropionyl azide can derivatized, hydroxy-steroids and the resultant derivatives are determined electrochemically by LC with the detection limits at subpicomole levels. 2-[2-(Azidocarbonyl)ethyl]-3-methyl-1,4-naphthoquinone (AMQ) reacts with primary and secondary alcohols to produce carbamic acid derivatives and is used in LC with BCD and FL detections. 7-Methoxycoumarin-4-carbonyl azide (7-MC-4-CON3) and 3,4-dihydro-6,7-dimethoxy-4-methyl-3-oxoquinoxaline-2-carbonyl azide (DMEQ-CON3) are also applied to LC with FL detection as precolumn reagents. 

Hydroxy-3,6-dimethoxy-4-methyl-5//-indeno[l,2-/)]pyridin-5-one, in T-30198 5-Hydroxy-2,7-dimethoxy-6-methyl-1,4-naphthoquinone, in T-20201... 

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