| Literature DB >> 24186219 |
A Janecka1, T Janecki, C Bowers, K Folkers.
Abstract
Several LHRH antagonists with trans-3-(4-pyrazinylcarbonylaminocyclohexyl)alanine (trans-PzACAla) in the position 5 were synthesized and their antiovulatory activity was compared with the activity of the analogs containing cis-PzACAla in this position. In all cases cis-isomer produced more potent analogs. Introduction of cis-PzACAla in the position 5 of Antide gave Antide B which completely inhibits ovulation at a dose of 0.5µg/rat. Antide B releases negligible histamine (ED50 = 104µg/mL), and has excellent solubility in water. Also, an improved synthesis of cis-PzACAla is reported, involving the hydrogenation of 4-aminophenylalanine on a rhodium catalyst to give the desired cis-isomer with a 53% yield.Entities:
Year: 1995 PMID: 24186219 DOI: 10.1007/BF00806547
Source DB: PubMed Journal: Amino Acids ISSN: 0939-4451 Impact factor: 3.520