Biological screening of a diverse set of AI-2 analogues in Vibrio harveyi suggests that receptors which are involved in synergistic agonism of AI-2 and analogues are promiscuous
作者:Jacqueline A. I. Smith、Jingxin Wang、Sao-Mai Nguyen-Mau、Vincent Lee、Herman O. Sintim
DOI:10.1039/b909666c
日期:——
C1-alkyl AI-2 analogues do not induce bioluminescence in V. harveyi on their own but enhance the bioluminescence induced by AI-2 in a synergistic fashion. A new facile synthesis of AI-2 facilitates the synthesis of a diverse set of AI-2 analogues and biological screening suggests that receptors that are involved in the synergistic bioluminescence production in V. harveyi are promiscuous.
Ozonolysis of Alkynes—A Flexible Route to Alpha-Diketones: Synthesis of AI-2
作者:Joshua L. Alterman、Dua X. Vang、Marissa Roghair Stroud、Larry J. Halverson、George A. Kraus
DOI:10.1021/acs.orglett.0c02182
日期:2020.10.2
A mild procedure for the low-temperature conversion of alkynes to diketones has been developed and employed in the synthesis of AI-2.
已经开发了一种温和的程序,用于将炔烃低温转化为二酮,并用于合成AI-2。
Interaction of (−)-Epigallocatechin Gallate and Deoxyosones Blocking the Subsequent Maillard Reaction and Improving the Yield of <i>N</i>-(1-Deoxy-<scp>d</scp>-xylulos-1-yl)alanine
Maillard reaction intermediateformation in the xylose/alanine model system. A trapping effect of EGCG on the reactive deoxyosones was observed to change the reaction pathways. The rate constant of Amadori rearrangement product (ARP) conversion to deoxyosones was decreased with EGCG addition, indicating an inhibition of ARP degradation. Dehydration improved the ARP formationduring the thermal reaction
anal and 3-buten-2-one followed by desilylation gave rise to the corresponding α-methylene-β,γ-dihydroxy ketone further converted by reductive ozonolysis of the carbon–carbon double bond into racemic 4,5-dihydroxy-2,3-pentanedione (DPD), a significant molecule in bacterial cell–cell communication systems. The same sequence applied to other substrates allowed the preparation of chain elongated analogues
An elimination–rearrangement of ribulose-1,5-bisphosphate with implications for riboflavin biosynthesis
作者:David H. G. Crout、John A. Hadfield
DOI:10.1039/c39870000742
日期:——
Ribulose-1,5-bisphosphate (5) undergoes a sequence of elimination and benzilic acid rearrangement in a process with features that parallel those of the rearrangement occuring during incorporation of pentose precursors into riboflavin (1).