Green semi-hydrogenation of alkynes by Pd@borate monolith catalysts under continuous flow

- Palladium nanoparticles immobilized onto an unconventional borate macroporous monolith.
- Liquid-phase catalytic semi-hydrogenation reaction of substituted alkynes under continuous flow.
- Excellent efficiency and long-term stability under mild reaction conditions.
- No need of additives.
- Selectivity comparable to that of the batch industrial processes.