Synthesis of Fmoc-Protected Arylphenylalanines (Bip Derivatives) via Nonaqueous Suzuki-Miyaura Cross-Coupling Reactions
作者:Jennifer X. Qiao、Kenneth J. Fraunhoffer、Yi Hsiao、Yi-Xin Li、Chunlei Wang、Tammy C. Wang、Michael A. Poss
DOI:10.1021/acs.joc.6b01965
日期:2016.10.7
A one-step synthesis of Fmoc-protected aryl/heteroaryl-substituted phenylalanines (Bip derivatives) using the nonaqueous palladium-catalyzed Suzuki–Miyauracross-coupling (SMC) reaction of Fmoc-protected bromo- or iodophenylalanines is reported. This protocol allows for the direct formation of a variety of unnatural biaryl-containing amino acids in good to excellent yield, which can be readily used
N-protective group of the corresponding tripeptide derivatives, was examined to accomplish construction of a cyclic isodityrosine derivative undersolid-phaseconditions. The desired cyclization was effected under the TTN (thallium(III) trinitrate)/NMP–MeOH conditions to give the corresponding 17-membered ring lactam 12.