Abstract A terpene‐based biorefinery is described that uses crude sulfate turpentine (CST) and gum (GT) to produce mixtures of p ‐menthadienes ( ‐MeDs) as biorenewable terpene feedstocks. An acid catalyzed ring opening reaction (6 m aq. H 2 SO 4 , 90 °C) first used convert the major bicyclic monoterpenes (α‐pinene, β‐pinene, 3‐carene) in untreated CST (or GT with 5 mol% Me S) into monocyclic ‐M...

A new route for constructing PAHs from cyclohexanone by trimerization, bromination, trisannulation and aromatization, and the synthesis of a novel sulfur-containing polycyclic heteroaromatic have been described.

Metabolic aromatization of xenobiotics is an unusual reaction with some documented examples. For instance, the oxidation of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine to the neurotoxic pyridinium ion metabolite 1-methyl-4-phenylpyridinium by monoamine oxidase (MAO) B in the brain has been of interest to a number of investigators. It has also been reported that although the aromatization of N-...

Hantzsch 1 ,4- dihy&opyridines are rapidly oxidized to the corresponding pyridine derivatives using zinc chlorochromate nonahydrate [Zn(C1CrO ) .9H O] in dichloromethane at room temperature. In addition to aromatization, no loss of the 4- substituent is observed

Melanin is an important biopolymeric pigment produced in a vast majority of organisms. Tyrosine and its hydroxylated product, dopa, form the starting material for melanin biosynthesis. Earlier studies by Raper and Mason resulted in the identification of dopachrome and dihydroxyindoles as important intermediates and paved way for the establishment of well-known Raper-Mason pathway for the biogen...