... of the process, the aldol reaction was carried out at 100 °C for 30 min using 20 mol% of catalyst C. Although the chemical yield of 4 ... (a) J. Bonjoch and F. Diaba, Studies in Natural Products Chemistry, 2005, 32, 3 ... Lett., 2005, 7, 5461–5464 CrossRef CAS and references therein. ...