13-Aminotridecanoic acid, the monomer for nylon 13, was synthesized from commercial erucic acid or its derivatives by several methods in a study to determine the method of choice, which involved oxidative ozonolysis of eruconitrile, followed by esterification before isolation to give methyl 12-cyanododecanoate. The cyano ester was then catalytically reduced and hydrolyzed, without isolation of ...

1. After administration of 600mg of 3H-labelled aldosterone to human volunteers, 57 mg of homogeneous acid-labile conjugate was isolated from the urine and identified as aldosterone 18 beta-D-glucosiduronic acid. 2. Esterification and acetylation of the conjugate gave a tetra-acetate methyl ester, which, by measurement of the optical rotation and nuclear-magnetic-resonance spectrum, was shown t...

Bu çalışma endemik Amanos Sığırkuyruğu ile Belen sığırkuyruğunun uçucu bileşenlerini ortaya çıkarmak için bitki eksratte edilmiş ve ultrasonic banyo yapılarak GS-MS analizi yapılmıştır. GC-MS kütüphanesinde sonuçlarına göre bileşenler kıyaslandığında, Sığırkuyruğunda kimyasal bileşenlerinin benzerlik ilişkileri toplam on üç bileşen bulunmuştur. ise dört tespit edildi. bileşenlerin biyoaktivitel...

Chemical analysis of the Mediterranean ascidian Polyandrocarpa zorritensis (Van Name 1931) resulted in the isolation of a series of molecules including two monoindole alkaloids, 3-indolylglyoxylic acid (3) and its methyl ester (4), 4-hydroxy-3-methoxyphenylglyoxylic acid methyl ester (1) and a new alkaloid we named zorrimidazolone (2). The structure of the novel compound 2 has been elucidated b...