Synthesis of 1-O-acylglycerol 2,3-cyclic phosphate: Determination of the absolute structure of PHYLPA, a specific inhibitor of DNA polymerase α
摘要:
Four possible stereoisomers of PHYLPA, a specific inhibitor of DNA polymerase alpha, were synthesized in enantioselective manners. These isomers were examined for inhibition activity for DNA polymerase alpha, and the structure of PHYLPA was established as sodium 1-O-[(9'S, 10'R)-9',10'-methanohexadecanoyl]-sn-glycerol 2,3-cyclic phosphate.
Total Synthesis of an Immunogenic Trehalose Phospholipid from <i>Salmonella</i> Typhi and Elucidation of Its <i>sn</i>-Regiochemistry by Mass Spectrometry
作者:Vivek K. Mishra、Jeffrey Buter、Molly S. Blevins、Martin D. Witte、Ildiko Van Rhijn、D. Branch Moody、Jennifer S. Brodbelt、Adriaan J. Minnaard
DOI:10.1021/acs.orglett.9b01725
日期:2019.7.5
Diphosphatidyltrehalose (diPT) is an immunogenic glycolipid, recently isolated from Salmonella Typhi. Despite rigorous structure elucidation, the sn-position of the acyl chains on the glycerol backbone had not been unequivocally established. A stereoselective synthesis of diPT and its regioisomer is reported herein. Using a hybrid MS3 approach combining collisional dissociation and ultraviolet photodissociation mass spectrometry for analysis of the regioisomers and natural diPT, the regiochemistry of the acyl chains of this abundant immunostimulatory glycolipid was established.