Azomethine ylides have been generated from aromatic aldimines of -amino acid methyl esters under treatment with LiBr/Et 3 N and trapped with tert-butyl acrylate yielding racemic orthogonally protected cis-5-arylpyrrolidine-2,4-dicarboxylates regio-and stereo-selectively in high yields. Subsequent N-methylation and deprotection of 4-carboxylic group of cycloaddition products led to novel prolineglutamate cis-chimeras with substituents at 2 and 5 positions of pyrrolidine scaffold.
The chlorination of benzene, toluene, and o xylene with molecular chlorine in the pres ence of the phthalocyanine complexes of different structures was studied. The transformations of the catalysts during the reaction were investigated.
Diğer tüm organizmalar gibi, balıklar da, araştırmalarda antimikrobiyal, antihipertensif, antioksidan ve antitümör aktivitelerine odaklanılan bio-aktif bileşiklerin zengin kaynağıdırlar. Bunlar, sadece yüksek besin değeri nedeniyle değil, özellikle son yirmi yılda geliştirilen analitik yöntemlerle elde edilen peptidleri açısından da kullanılabilirler. Akuatik canlılar dünya üzerinde en fazla tür sayısına sahiptir, dolayısıyla bunlardan bio-aktif peptidlerin eldesi diğerlerine göre oldukça olasıdır ve bu, önceki çalışmalarda açıkça ortaya konmuştur. Doğal peptidler ve uzun zincirli polipeptidlerden uygun enzimatik yöntemlerle elde edilen peptidler tıp alanında yeni ufuklar açabilirler.
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