Iridium-catalysed C–H borylation of β-aryl-aminopropionic acids
作者:Henry Robinson、Joe Stillibrand、Klemensas Simelis、Simon J. F. Macdonald、Andrew Nortcliffe
DOI:10.1039/d0ob01495h
日期:——
β-aryl-aminopropionic acid boronates. The synthetic versatility of these new boronates is demonstrated throughsequentialone-pot functionalisation reactions to give diverse building blocks for medicinal chemistry. The C–H borylation is also effective for dipeptide substrates. We have exemplified this methodology in the synthesis of a pan αv integrin antagonist.
Antithrombotic compounds of general formula
1
Exemplary are:
(1) 2-(5-carbamimidoyl-2-hydroxy-phenyl)-N-[
3
-methyl-4-(pyrrolidin-1-yl-carbonyl)-phenyl]-ethylamine,
(2) N-(5-carbamimidoyl-2-hydroxy-benzyl)-3-methyl-4-(pyrrolidin-1-yl-carbonyl)-benzylamine, and
(3) N-(5-carbamimidoyl-2-hydroxy-benzyl)-2,5-dimethyl-4-(pyrrolidin-1-yl-carbonyl)-benzylamine.
Cyclic imides are inhibitors of tumor necrosis factor .alpha. and can be used to combat cachexia, endotoxic shock, and retrovirus replication. A typical embodiment is 2-(2,6-dioxo-3-piperidinyl)-4-azaisoindoline-1,3-dione.
Cyclic amides are inhibitors of tumor necrosis factor and can be used to combat cachexia, endotoxic shock, and retrovirus replication. A typical embodiment is 3-phenyl-3-(1-oxoisoindolin-2-yl)propionamide.
Cyclic imides are inhibitors of tumor necrosis factor .alpha. and can be used to combat cachexia, endotoxic shock, and retrovirus replication. A typical embodiment is 2-(2,6-dioxo-3-piperidinyl)-4-azaisoindoline-1,3-dione.