Fig. 1

Reaction mechanism of TRFS-green and summary of current work. a Stepwise activation of TRFS-green. b Strategy for modification of TRFS-green. c One-step activation of Fast-TRFS

Reaction mechanism of TRFS-green and summary of current work. a Stepwise activation of TRFS-green. b Strategy for modification of TRFS-green. c One-step activation of Fast-TRFS