“…Representative procedure: A homogeneous mixture of 2-(heptyloxy)tetrahydro-2H-pyran 12 (entry c) (0.300 g, 1.498 mmol), allyltrimethylsilane (0.291 g, 0.40 mL, 2.547 mmol, 1.7 equiv), and acetic anhydride (0.260 g, 0.24 mL, 2.547 mmol, 1.7 equiv) was stirred at rt under N2 as…”