Table 1 Structures and Hammett sigma constants of DTTs
Entry | R1 (σp) [31] | R2 (σp) [31] | Entry |
|---|---|---|---|
– | H | H | D3T |
1a | 4-NO2-C6H4 (0.26) | H (0) | 4a |
1b | Ethyl (−0.15) | H (0) | 4b |
1c | CO2Et (0.50) | H (0) | 4c |
2a | H (0) | Me (−0.17) | 5a |
2b | H (0) | 4-F-C6H4 (0.06) | 5b |
2c | H (0) | 4-pyridinyl (0.44) | 5c |
2d | H (0) | 2-furanyl (0.02) | 5d |
3a | CO2Et (0.50) | NH2 (−0.66) | 6a |
3b | CO2Et (0.50) | Me (−0.17) | 6b |
3c | CO2Et (0.50) | NHC(O)Me (0.00) | 6c |
3e | 4-Cl-C6H4 (0.12) | NH2 (−0.66) | 6d |
3d | SO2Ph (0.68) | NH2 (−0.66) | 6e |
3f | CN (0.66) | NH2 (−0.66) | 6f |
3g | Cl (0.23) | 4-OMe-C6H4 (−0.08) | 6g |
3h | Cl (0.23) | C6H5 (−0.01) | 6h |
3i | Cl (0.23) | Ethyl (−0.15) | 6i |