An improvement to the synthesis of deuterated meso‐tetraphenylporphyrins

An improved method for the synthesis of deuterated tetraphenylporphyrins (TPPs) is reported. In this method, deuterium labelling at the pyrrole–β‐position is increased to more than 95 at%. TPP is the most widely used synthetic porphyrin and high deuterium incorporation is essential for spectroscopic studies and kinetic studies involving relaxation processes. Copyright © 2006 John Wiley & Sons, Ltd.