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A Convenient One-step Synthesis of 5-cystein-s-yldopa Using Ceric Ammonium-nitrate
No full textA facile one step synthesis of 5-S-cysteinyldopa 3, involving addition of cysteine to dopaquinone, generated in situ by oxidation of dopa 1 with ceric ammonium nitrate, in 2M sulfuric acid, is reported. © 1986, Taylor & Francis Group, LLC. All rights reserved
Occurrence and Distribution of Mycosporine-like Amino-acids In Mytilus-galloprovincialis and Related Bivalvs
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A simple synthesis of aaptamine, a 1H benzo(de) 1,6 naphthiridine alkaloid
No full textAaptamine, a 1H-benzo[de][1,6]-naphthyridine alkaloid, is prepared by the triphenylphosphite reduction of a vinylic nitro derivativ
A New Synthesis of 4H-1,4-Thiazines and Benzothiazines
No full textBenzothiazines I [R1 = H, R2 = Me, Ph; R1 = Me, R2 = Ph; R1R2 = (CH2)4] and thiazines II [R1 = H, R2 = Me; R1R2 = (CH2)4] were prepd. in 23-59% yield by treatment of III or IV with p-MeC6H4SO3H in MePh at reflux for 30 min. III were prepd. in 13-81% yield by oxidn. of the resp. sulfide; unsym. 2-substituted dihydrobenzothiazoles gave a mixt. of 2 diastereoisomeric sulfoxides
Acyclic and cyclic urea formation via the cobalt catalised oxidative carbonylation of aromatic primary amines
No full textThe N,N-bis(salicylidene)ethylenediaminocobalt(II)-catalysed oxidative carbonylation of aromatic primary amines in methanol gives ureas in good yields, with small amounts of carbamates and azo derivatives. Ortho-substituted aromatic amines also give cyclic ureas via a metal-induced oxidative carbonylation-cyclisation pathway
Peroxidase, mixed-function oxidase and metal- catalyzed oxidation of phenylpropenoidic compounds
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