“…2, 84.6, 81.4, 65.1, 35.7, 33.1, 27.6, 25.0, 22.4, 15.2; HRMS (CI) m/z: [M + H] + Calcd for C 10 H 17 O 3 185.1178;Found 185.1177. ((3aS,3bS,4aS,5aR)-2,2-Dimethyltetrahydrocyclopropa[3,4]cyclopenta [1,2-d][1,3]dioxol-3b(3aH)-yl)methanol (5α) and ((3aS,3bR,4aR,4] 1, entry 1). To a stirred solution of diethylzinc (Et 2 Zn, 1.0 M in hexanes, 2.6 mL, 2.6 mmol, 2.0 equiv) in CH 2 Cl 2 (4 mL) was added diiodomethane (CH 2 I 2 , 0.4 mL, 5.29 mmol, 4.0 equiv) carefully at 0 °C.…”