Rapid and efficient synthesis of peptide fragments containing α-aminoisobutyric acid using Fmoc-amino acid chlorides/potassium salt of 1-hydroxybenzotriazole
作者:Vommina V. Suresh Babu、Hosahudya N. Gopi
DOI:10.1016/s0040-4039(97)10724-9
日期:1998.2
The synthesis of peptides containing multiple Aib residues was accomplished using Fmoc-Aib-Cl in presence of KOBt. As no additional base was added, the duration of coupling reactions could be extended. Thus, the synthesis of the alamethicin 1–4 fragment, Aib-Pro-Aib-Ala, the emerimicin 2–6 fragment, Aib-Aib-Aib-Val-Gly and the Aib tetramer, Fmoc-(Aib)4-OBzl were accomplished in good yield and purity
A Novel Synthetic Method for Bepotastine, a Histamine H1 Receptor Antagonist
作者:Tae Hee Ha、Kwee-Hyun Suh、Gwan Sun Lee
DOI:10.5012/bkcs.2013.34.2.549
日期:2013.2.20
(+)-(S)-4-(4-((4-chlorophenyl)(pyrid-2-yl)methoxy]piperidin-1-yl)butanoic acid, bepotastine (1) is described. The key resolution of (R/S)-bepotastine l-menthyl ester (3) is achived viadiastereomeric salt crystallizationusing N-benzyloxycarbonyl-L-aspartic acid (NCbzLAA) as the resolving agent to provide (S)-bepotastine l-menthyl ester (S)-3. Hydrolysis of (S)-bepotastine l-menthyl ester (S)-3 afforded