Finally, we aimed to test the method's compatibility with a preceding oxidation of a primary alcohol to an aldehyde in a solvent-free, sequential one-pot conversion (Figure ; for details, see SI). Initially, we used Dess-Martin periodinane (DMP) to oxidize 4-biphenyl methanol (IV) to 4-phenyl benzaldehyde (I), giving 93% isolated product in just 30 seconds at 36 Hz. However, attempts to couple this oxidation with a Wittig olefination in a one-pot conversion gave a maximum of 31% for olefin 1, likely due to incompatibility between Dess-Martin oxidation by-products and the phosphonium species (Figure , top).