Synthesis of N-Butyl Side Chain Hydroxylated Metabolites of Roxifiban, a Platelet Glycoprotein IIb/IIIa Receptor Antagonist
摘要:
Syntheses of three n-butyl side chain hydroxylated metabolites of Roxifiban (5, 6a and 6b) are reported. Initial use of benzyl as hydroxyl protecting group gave poor yield during its removal by catalytic hydrogenation, due to complication from N-O cleavage of the isoxazoline. This problem was eliminated by the use of TBDMS as the hydroxyl protecting group. The chemical structures of these metabolites as well as the intermediates have been fully characterized.
Total Synthesis of the Proposed Structure of the Anthrapyran Metabolite δ-Indomycinone
作者:Lutz F. Tietze、Ramakrishna Reddy Singidi、Kersten M. Gericke
DOI:10.1002/chem.200700823
日期:——
diastereoselective alkylation of enantiomerically pure dioxolanone 8. The reported synthetic approach has the advantage of high yields, excellent selectivity and a remarkable general applicability for the total synthesis of other anthrapyran natural products. The spectroscopic data obtained for the synthetic compounds 2 and 36 are not in agreement with those reported for the natural product, and therefore
AMINO ACID HAVING FUNCTIONAL GROUP CAPABLE OF INTERMOLECULAR HYDROGEN BONDING, PEPTIDE COMPOUND CONTAINING SAME AND METHOD FOR PRODUCTION THEREOF
申请人:CHUGAI SEIYAKU KABUSHIKI KAISHA
公开号:EP3896056A1
公开(公告)日:2021-10-20
It has been found that the membrane permeability of peptide compounds can be improved by making at least one of amino acids constituting the peptide compound be an amino acid having a side chain capable of forming an intramolecular hydrogen bond.
[EN] AMINO ACID HAVING FUNCTIONAL GROUP CAPABLE OF INTERMOLECULAR HYDROGEN BONDING, PEPTIDE COMPOUND CONTAINING SAME AND METHOD FOR PRODUCTION THEREOF<br/>[FR] ACIDE AMINÉ AYANT UN GROUPE FONCTIONNEL CAPABLE DE FORMER UNE LIAISON HYDROGÈNE INTERMOLÉCULAIRE, COMPOSÉ PEPTIDIQUE LE CONTENANT ET SON PROCÉDÉ DE PRODUCTION<br/>[JA] 分子内水素結合可能な官能基を有するアミノ酸とそれらのアミノ酸を含むペプチド化合物、およびそれらの製造方法