144690-92-6,is a common compound. C48H44N6O6In an article, once mentioned the new application about 144690-92-6.
A solution of MTT in an organic solvent and water (20%) was heated for 4-8 hrs at reflux. When the solvents were either acetonitrile (ACN), isopropyl alcohol (IPA) or t-butanol (t-BuOH), 1 volume of water was added, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.). Table 1 shows the process details with different organic solvents: TABLE 1 Total solvent Time Solvent(s) Volume Temperature ( C.) (hrs) pH ACN:H2O 5:1 + 1 85 7 4.89-4.3 IPA:H2O 5:1 + 1 85 7 4.62-4.25t-BuOH:H2O 5:1 + 1 85 7 4.78-4.28n-propanol:H2O 5:1 reflux 2.5 4.3n-BuOH:H2O 5:1 110 2.5 4.412-BuOH:H2O 5:1 100 3 4.5iso-penthanol:H2O 5:1 100 3 5DMA:H2O 5:1 100 4 4.5DMF:H2O 5:1 100 4 4.5
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Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
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