作者:Daniel J. Leonard、John W. Ward、Jonathan Clayden
DOI:10.1038/s41586-018-0553-9
日期:2018.10
α-aryl amino acids and their derivatives are valuable precursors to bioactive molecules10,11. Here we describe the synthesis of quaternary α-aryl amino acids from enantiopure amino acid precursors by α-arylation without loss of stereochemical integrity. Our approach relies on the temporary formation of a second stereogenic centre in an N′-arylurea adduct12 of an imidazolidinone derivative6 of the precursor
Substituted Dihydroisoquinolinones by Iodide-Promoted Cyclocarbonylation of Aromatic α-Amino Acids
作者:Mostafa M. Amer、Ana C. Carrasco、Daniel J. Leonard、John W. Ward、Jonathan Clayden
DOI:10.1021/acs.orglett.8b03551
日期:2018.12.21
of aromatic α-amino acids, on treatment with phosgene and potassium iodide, undergo a mild Bischler–Napieralski-style cyclocarbonylation reaction that generates a tricyclic lactam by insertion of a C═O group between amino acid nitrogen and the ortho position of the aryl substituent. Regio- and diastereoselective functionalization of the lactam generates a library of substituted dihydroisoquinolinones
‘Reverse biomimetic’ synthesis of <scp>l</scp>-arogenate and its stabilized analogues from <scp>l</scp>-tyrosine
作者:Louise Eagling、Daniel J. Leonard、Maria Schwarz、Iñaki Urruzuno、Grace Boden、J. Steven Wailes、John W. Ward、Jonathan Clayden
DOI:10.1039/d1sc03554a
日期:——
key role in the synthesis of plant secondary metabolites including alkaloids and the phenylpropanoids that are the key to carbon fixation. Yet understanding the control of arogenate metabolism has been hampered by its extreme instability and the lack of a versatile synthetic route to arogenate and its analogues. We now report a practical synthesis of L-arogenate in seven steps from O-benzyl L-tyrosine