PhidianidineB (1), a natural 1,2,4-oxadiazole linking both an indole system and an aminoalkyl guanidine group that has been recently reported from a marine mollusk, has been synthesized in seven steps (14% total yield). The synthetic procedure, which is based on the coupling of 3indolacetic acid methyl ester and the amino-alkyl hydroxy guanidine intermediate 2, opportunely prepared, is of general
Phidianidine B (1) 是一种天然 1,2,4-恶二唑,可连接吲哚系统和最近从海洋软体动物中报道的氨基烷基胍基团,分七步合成(总产率 14%)。该合成程序基于 3 吲哚乙酸甲酯和氨基-烷基羟基胍中间体 2 的偶合,适时制备,具有普遍应用性,可以合成具有不同烷基链长度或吲哚环取代的类似物.
An acyl-SAM analog as an affinity ligand for identifying quorum sensing signal synthases
We here report the affinity purification of N-acylhomoserine lactone synthases using beads conjugated with an enzyme inhibitor, which was designed based on the catalytic intermediate acyl-SAM.
Mechanism of the von Braun amide degradations with carbonyl bromide or phosphorus pentabromide
作者:B.A. Phillips、G. Fodor、J. Gal、F. Letourneau、J.J. Ryan
DOI:10.1016/s0040-4020(01)93483-0
日期:1973.1
isolation of crystalline n-alkylene-α-bromoiminium bromides, and their smooth thermal decomposition, which makes the von Pechmann-von Braun type of degradation competitive to the Hofmann methylation; (2) new procedure was found for preparing ammonium tribromides and iododibromides using carbonyl bromide; (3) a number of the heterofore unknown imidoyl bromides have been prepared and characterized, and their
The synthesis and structural characterization of a first family of dendronized polycationicperylenetetracarboxylicaciddiimides (PDIs) 7, 8, and 10 is reported. They were obtained by amide coupling reactions of pyridinium salt head groups with terminal carboxylic groups of Newkome-dendron-type functionalized PDIs. Resulting pyridinium-terminated PDIs 7, 8, and 10 are highly water-soluble, independent
Synthesis, structure, and stereospecific cross-[2+2] photocycloaddition of pseudodimeric complexes based on ammonioalkyl derivatives of styryl dyes
作者:Sergey P. Gromov、Artem I. Vedernikov、Sergey K. Sazonov、Lyudmila G. Kuz’mina、Natalia A. Lobova、Yuri A. Strelenko、Judith A. K. Howard
DOI:10.1039/c5nj03500g
日期:——
Two different styryl dyes form pseudodimeric complexes via hydrogen bonding and stacking interactions; irradiation of these complexes gives rctt-cyclobutane derivatives.