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With alkaly hydroxide or an strong acid solution; In water;pH 5 - 7;Acidic conditions;
The compound in Example 1 was also prepared by dissolving an amount of <strong>[14252-80-3]<strong>[14252-80-3]bupivacaine</strong> hydrochloride</strong> in water. This solution was added to an aqueous solution (pH 8.0) containing an eqiumolar amount of diflunisal. After mixing the pH of the reaction mixture was adjusted to pH 5-7 by using a suitable alkali hydroxide or an strong acid solution. The precipitated salt was isolated and recrystallized as described in Examples 1and 2.
0.373 g of diflunisal (1 .491 mmol) and 0.269 g of L-<strong>[3081-61-6]theanine</strong> (1 .544 mmol) were weighed directly into the bowl of an agate mortar, and wetted with 70% isopropanol to form a moderately thick slurry. The slurry was thoroughly ground at the time of mixing, and then periodically re-ground until the contents were dry. The XRPD pattern of the product is shown in Figure 10a, while the FTIR spectrum is shown in Figure 10b. The DSC melting endotherm of the product was characterized by a peak maximum at 172C.