... 29 In addition, they have shown their utility in several fields of medicinal and agricultural chemistry. ... No significant change in the chemical yield of the process was observed in these cases. ... 2, 6a, c-C 6 H 11, Ph, 1b, 75. 3, 6a, p-MeOC 6 H 4, Ph, 1c, 72. 4, 6a, (±)-C 6 H 5 (Me)CH, Ph ...