A Novel Method for the Synthesis of Newfangled Asymmetric Schiff Bases from -amino Acids under Ultrasonic Conditions and in Aqueous Medium
Yükleniyor...
Dosyalar
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley-V C H Verlag Gmbh
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Chiral Schiff bases were obtained at high yields via a novel technique. Aryl aldehydes and chiral -amino acids were treated (1) in the presence of H3PO4 in ethanol at 80 degrees C for 24 h, and (2) in the presence of K2CO3 under ultrasonic conditions in an aqueous ethanol medium within 5 min with yields reaching up to 96%. The results showed that the presented methodology under ultrasonic conditions was effective, practical, and eco-friendly compared to that using an acidic medium. The corresponding asymmetric Schiff bases were synthesized for the first time, and were characterized by H-1 and C-13 nuclear magnetic resonance and infrared spectroscopy and high-resolution mass spectrometry.
Açıklama
WOS: 000385373600009
Anahtar Kelimeler
Chirality, Amino acids, Schiff bases, Aldehydes
Kaynak
Journal Of The Chinese Chemical Society
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
63
Sayı
9
