Sulfonic acid-functionalized polyallylamine (sevelamer) as an efficient reusable strong solid acid catalyst for the synthesis of xanthenes derivatives

Table 1 Temperature and catalyst amount for the synthesis of 1,8-dioxo-octahydroxanthene

Reaction conditions: 1a (1.0 mmol), 2a (2.0 mmol), S-SO₃H (10 mg), water (1.0 mL), 90 °C
^aIsolated yield

ISSN: 2661-801X