Gaussian16 optimizations of TS1 (2->3)  in water PCM model with adjusted epsilon of 144.8. 

The TS1_1 <1 kcal/mol more stable.

B3LYP: Optimizations at B3LYP-D3/6-31+G(d,p) level of theory 
PBE: Optimizations at PBE-D3/6-31G(d,p) level of theory 
