Complete recipeSource: SI
Route 1: Other
S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1
Metal precursorsnone
Linker precursors4,5-dimethoxy-1,2-benzenediamine; 2,4,5-trimethoxybenzoic acid; compound 1 intermediate
Solventschloroform; DCM; water; chloroform/toluene for crystals
AdditivesPh3PCl2; HCl; NaHCO3; MgSO4; BBr3
Atmospherenitrogen during BBr3 demethylation
Temperaturereflux for amidation; 0 C addition then room temperature for demethylation
Time17 h amidation; 12 h demethylation
Oxidant / reductantBBr3 demethylation reagent
Work-uppoured into ice-cold water, extracted with DCM, acid/base washes, brine, dried over MgSO4, silica gel column; demethylation poured into ice water, filtered, washed with water
Activationnone reported for ligand
Scalability contextStep yields: 93% for compound 1 and 94% for 6OH-HBB; main text states 93% over two steps, which is inconsistent with SI step yields.
Show 9 structured reagent records
| Role | Reagent | Amount / concentration | Source |
|---|---|---|---|
| Additive | Ph3PCl2 | 1.60 g, 4.8 mmol | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Linker | 4,5-dimethoxy-1,2-benzenediamine | 0.17 g, 1.0 mmol | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Linker | 2,4,5-trimethoxybenzoic acid | 0.51 g, 2.4 mmol | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Solvent | chloroform | 40 mL | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Other | compound 1 | 1.1 g, 2.0 mmol | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Solvent | DCM | 100 mL | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Other | BBr3 | 0.9 mL, 9 mmol · 99% | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Acid | HCl | 4 M aqueous solution | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |
| Base | NaHCO3 | saturated aqueous solution | S8-S9 · Section 2.1 Synthesis of Ligands · Scheme S1 |