@article{202105.0493,
	doi = {10.20944/preprints202105.0493.v1},
	url = {https://doi.org/10.20944/preprints202105.0493.v1},
	year = 2021,
	month = {May},
	publisher = {Preprints},
	author = {Lamya H. Al-Wahaibi and Antar A. Abdelhamid and Sayed A. Saber and Nadia A.A. Elkanzi and Ali M. Ali},
	title = {Pumice as a Novel Nature Heterogeneous Catalyst for Synthesis of 3,4-dihydropyrimidine-2-(1H)-Ones/Thiones via Biginelli Reaction under Solvent-free Conditions},
	journal = {Preprints}
}