Amino acid restriction by inhibition of neutral amino acid transporter, B<sup>0</sup>AT1 (SLC6A19) activity has been recently shown to improve glyceamic control by upregulating glucagon like peptide (GLP1) and fibroblast growth factor (FGF21) in mice. Hence, pharmacological inhibition of B<sup>0</sup>AT1 is expected to treat type-2 diabetes and related disorder. In this study, rationally designed trifluoromethyl sulfonyl derivatives were identified as novel, potent and orally bioavailable B<sup>0</sup>AT1 inhibitors. Compound 39 was found to be nanomolar potent (IC<sub>50</sub>: 0.035 µM) B<sup>0</sup>AT1 inhibitor with excellent pharmacokinetic profile (%F: 66) in mice and efficacious in vivo in diet induced obese (DIO) mice model.