List of Articles Solid bases Open Access Article Abstract Page Full-Text 1 - Silica-bonded n-propyltriethylene-tetramine as a recyclable solid base catalyst for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes Marzieh Makvandi Fatemeh Abiar Dil Ameneh Malekzadeh Mojtaba Baghernejad Khodabakhsh Niknam