Asymmetric synthesis of β-pyridyl-β-amino acid derivatives
作者:Steven D. Bull、Stephen G. Davies、David. J. Fox、Massimo Gianotti、Peter M. Kelly、Camille Pierres、Edward D. Savory、Andrew D. Smith
DOI:10.1039/b204653a
日期:——
The conjugate additions of homochiral lithium (R)-N-benzyl-N-α-methyl-4-methoxybenzylamide to tert-butyl 3-(3-pyridyl)- and tert-butyl 3-(4-pyridyl)-prop-2-enoates proceed in 84% de, and after subsequent recrystallisation and oxidative N-deprotection furnish the (S)-3-(3-pyridyl)- and (S)-3-(4-pyridyl)-β-amino acid derivatives in 97% ee and 98% ee respectively. Conjugate additions of lithium N-benzyl-N-α-methyl-4-methoxybenzylamide to tert-butyl 3-(2-pyridyl)prop-2-enoates proceed with low levels of diastereoselectivity unless the 3-(2-pyridyl) ring is substituted. Application of this methodology allows the asymmetric synthesis of (R)-tert-butyl 3-(2-chloro-3-methoxymethoxy-6-pyridyl)-3-aminopropanoate, the protected β-amino ester component of kedarcidin, in 97% ee.
COMPOUNDS FOR BINDING TO THE PLATELET SPECIFIC GLYCOPROTEIN IIB/IIIA AND THEIR USE FOR IMAGING OF THROMBI
申请人:Berger Markus
公开号:US20140314669A1
公开(公告)日:2014-10-23
The present invention relates to novel fluorine containing compounds, methods for their preparation, the intermediates of the synthesis, their use as diagnostic agents, especially for imaging of thrombi. The invention relates to positron emission tomography (PET) agents and associated precursor reagents, and methods for producing such radiolaveled agents for imaging of thrombi in a mammalian body. More particularly, the invention relates to small nonpeptide, high-affinity, specific-binding glycoprotein 11b/IIIa antagonists for imaging of thrombi.
COMPOUNDS FOR BINDING TO THE PLATELET SPECIFIC GLYCOPROTEIN IIb/IIIa AND THEIR USE FOR IMAGING OF THROMBI
申请人:PIRAMAL IMAGING SA
公开号:US20160137629A1
公开(公告)日:2016-05-19
The present invention relates to novel fluorine containing compounds, methods for their preparation, the intermediates of the synthesis, their use as diagnostic agents, especially for imaging of thrombi. The invention relates to positron emission tomography (PET) agents and associated precursor reagents, and methods for producing such radiolaveled agents for imaging of thrombi in a mammalian body. More particularly, the invention relates to small nonpeptide, high-affinity, specific-binding glycoprotein 11b/IIIa antagonists for imaging of thrombi.