Originally Posted by SkyDog75

Nope. The cable pull ratio of Shimano mountain bike derailleurs isn't compatible with road shifters.

But here's an idea if your derailleur won't swing wide enough to accommodate the crankset: If your frame doesn't have an integral braze-on mount for the front derailleur, you can try using SRAM's 'wide spacing' braze-on adapter to position a Tiagra 4700 triple braze-on front derailleur a few more millimeters outboard.

SRAM Wide Spacing Braze-On Adapter | Jenson USA

You'll still have a mismatch between the crankset's chainring size and the ring sizes the derailleur cage was sculpted to fit, but hopefully not severe enough to prevent it from working. IRD's Alpina-D derailleur would fix the ring mismatch, and it's designed to work with road STI levers, but not the most recent STI levers. Shimano changed the derailleur geometry and cable pull ratio between Tiagra 4600 and 4700.