In this study, we presented a description of designing and synthesizing an original nano‐N‐sulfonated (‐SO3H) phthalocyanine molten salt (vanadium‐oxo pyridiniumporphyrazinato sulfonic acid) [VO(TPPASO3H)]Cl as a recyclable and efficient heterogeneous catalyst with thermal stability for synthesizing pyrazole and dihydropyrano[2,3]pyrazole derivatives. After recycling and reapplying five times, this catalyst indicated no significant decrease in the catalytic activity.
The address of the corresponding author was incorrect and has been changed. The proper address is provided below. Furthermore, Figure 1 is awed in the original article which leads to a misleading UV explanation. Therefore, Figure 1, its caption, and the respective UV-Vis analysis are correctly given below. The changes have no impact on the results and the overall conclusion of the manuscript.
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