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Synthesis of cyclobutanols 19’ and 11’d. Reagents and conditions: a) see Table 2, entry 2; b) 9‐BBN, THF, 0 °C to RT, 5 h, then NaOH, H2O2, RT, 24 h; c) Ph‐I, Pd2(dba)3 (dba=dibenzylideneacetone) (5 mol %), PPh3, K3PO4, Me4NHCO2, DMF, 81 °C, 20 h.
