Welcome to issue 4 of Organic Chemistry Frontiers for 2017 ! The latest OrgChemFront issue is published online now. 
The front cover story, De novo synthesis of alkyne substituted tryptophans as chemical probes for protein profiling studies is contributed by R. N. Nair, J. J. Rosnow, T. A. Murphree, M. E. Bowden, S. R. Lindemann and A. T. Wright. The inside cover features a story on Sequential In-catalyzed intramolecular hydroarylation and Pd-catalyzed cross-coupling reactions using bromopropargyl aryl ethers and amines by José Pérez Sestelo and his co-authors.
