Synthesis of l-α-amino-ω-bromoalkanoic acid for side chain modification
作者:Louis A. Watanabe、Binoy Jose、Tamaki Kato、Norikazu Nishino、Minoru Yoshida
DOI:10.1016/j.tetlet.2003.11.007
日期:2004.1
l-α-Amino-ω-bromoalkanoic acids with sidechain lengths varying from 4 to 10 methylene units have been conveniently synthesized as useful intermediates for the synthesis of functionalized non-natural amino acids.
The synthesis of specifically14C-labelled 2,6-diaminopimelic acid and its higher homologues
作者:J. Hanuš、K. Vereš
DOI:10.1002/jlcr.2590060205
日期:1970.4
D,L-2,6-Diaminopimelic-(2-14C) acid was prepared by alkylation of diethyl acetamidomalonate-(2-14C) with 5-bromo-N-phthaloyl-L-norvaline methyl ester and hydrolysis of the condensation product. Depending on the alkylation conditions, partial or complete racemisation takes place and therefore the L,L-form of diaminopimelic acid had to be isolated by paper chromatography. Alkylation of diethyl acetamidomalonate-(2-14C) with diethyl 4-bromobutyl- or 5-bromopentyl- or 6-bromohexylacetamidomalonate and subsequent hydrolysis of the condensation products gave D,L-2,7-diamino-suberic-(2-14C), D,L-2,8-diaminoazelaic-2-14C, and D,L-2,8-diaminosebacic-(2-14C) acids respectively.
作者:Marina Yu. Stogniy、Maria V. Zakharova、Igor B. Sivaev、Ivan A. Godovikov、Alexander O. Chizov、Vladimir I. Bregadze
DOI:10.1016/j.poly.2013.02.076
日期:2013.5
A series of new boron-containing amino acids 1-HOOCCH(NH2)(CH2)(n)S-1,2-C2B10H11 (n = 4-6) was prepared by alkylation of 1-mercapto-ortho-carborane with omega-bromoalkylacetamido diethylmalonates followed by acid hydrolysis and decarboxylation. Mild deboronation of the c/oso-carborane cage with CsF gives cesium salts of the corresponding nido-carborane based amino acids Cs[7-HOOccH(NH2)(CH2)(n) S-7,8-C(2)B9H(l1)] d (n = 4-6). The compounds synthesized can be used in radionuclide diagnostics and boron neutron capture therapy of cancer(C) . 2013 Elsevier Ltd. All rights reserved.