Das unterschiedliche massenspektrometrische Fragmentierungsverhalten von Lysinmethylester und dessenN,N?-Diacetylderivat. 27. Mitteilung �ber das massenspektrometrische Verhalten von Stickstoffverbindungen
作者:Felix Roessler、Manfred Hesse
DOI:10.1002/hlca.19770600209
日期:1977.3.9
The Different Behaviour of Lysine Methyl Ester and its N,N′-Diacetyl Derivative under Electron Impact
电子冲击下赖氨酸甲基酯及其N,N'-二乙酰基衍生物的不同行为
Competitive intramolecular aminolysis: Relative rates of 5- and 6-membered lactam ring closure
作者:Kevin H. Patterson、Gary J. Depree、Johannes A. Zender、Peter J. Morris
DOI:10.1016/s0040-4039(00)76532-4
日期:1994.1
5-Dape Me) undergoes competitive intramolecular aminolysis to 5-aminomethyl-2-pyrrolidinone (L5) and 5-amino-2-piperidinone (L6) in dilute alkaline aqueous solution at 25°C. Use of this single compound provides an ideal case for assessing the relative rates of 5- and 6-membered lactam ring closure. Assessments are also made using the intramolecular aminolysis of pairs of compounds: methyl 2,4-diaminobutanoate
Struktur und Stabilität von Schwermetallkomplexen basischer Aminosäuren mit und ohne Imidazolring
作者:Werner Schaeg、Friedhelm Schneider
DOI:10.1515/bchm2.1961.326.1.40
日期:1961.1
SYNTHESIS OF CYCLIC AMIDINES
申请人:Lentzen George
公开号:US20110178292A1
公开(公告)日:2011-07-21
The invention relates to an innovative method for synthesis of cyclic amidines. The synthesis starts from a β-, γ- or δ-lactone which is twofold brominated. After esterification of the carboxyl function, the bromine atoms are nucleophilically substituted and the corresponding diamino compound is obtained. The ring closure to the cyclic amidine is accomplished subsequently by reaction with orthoester, imidate or thioimidate. Owing to interposing additional steps for recovery of the diamino compound in enantiomerically pure form, the enantiomers of the cyclic amidines can be stereoselectively synthesized.
Effects of side chain amino nitrogen donor atoms on metal complexation of aminohydroxamic acids: New diaminohydroxamates chelating Ni(ii) more strongly than Fe(iii)
作者:Éva A. Enyedy、Hajnalka Csóka、István Lázár、Giovanni Micera、Eugenio Garribba、Etelka Farkas
DOI:10.1039/b111184a
日期:——
further interactions. The amino groups do not co-ordinate to aluminium(III) or iron(III) at all and the closer the side chain amino group is situated to the α-aminohydroxamic residue the less stable the hydroxamate complex formed in the order of Lysha, Dambha, Dampha, and hydrolytic processes become increasingly dominant. The co-ordination of the side chain amino nitrogen of Dampha and Dambha to nickel(II)