Synthesis of diazoketones derived from α-amino acids; problem of side reactions
作者:Krystyna Plucińska、Bogdan Liberek
DOI:10.1016/s0040-4020(01)81643-4
日期:1987.1
Optimum conditions of synthesis of eight diazoketones derived from optically active N-(t-butyloxycarbonyl)- and N-benzyloxycarbonylamino acids have been described. The problem of formation of by-products during Arndt-Eistert synthesis of β-homoamino acids at the stage of reaction of mixed anhydride with a weak nucleophile-diazomethane - has been discussed.
PLUCINSKA, KRYSTYNA;LIBEREK, BOGDAN, TETRAHEDRON, 43,(1987) N 15, 3509-3517
作者:PLUCINSKA, KRYSTYNA、LIBEREK, BOGDAN
DOI:——
日期:——
The formation of 2-benzyloxyoxazol-5(4H)-ones from benzyloxycarbonylamino-acids
作者:John H. Jones、Michael J. Witty
DOI:10.1039/p19790003203
日期:——
The cyclodehydration of benzyloxycarbonylamino-acids by successive treatment with acid chloride-forming reagents and triethylamine has been shown to give 2-benzyloxyoxazol-5(4H)-ones, not N-benzyloxycarbonylaziridinones as reported previously. The 2-benzyloxyoxazol-5(4H)-ones, which are the first 2-alkoxyoxazol-5(4H)-ones to be described, are more easily attacked by nucleophiles at position 5 and less