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Figure 3 . The reaction scheme for the synthesis of I through II Conditions: a) HOCH2CH2OH, PhMe, p-TsOH, 12 h, 25 °C. b) Cr(CO)6, Bu2O/THF (10:1), reflux, 40 h. |
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Figure 3 . The reaction scheme for the synthesis of I through II Conditions: a) HOCH2CH2OH, PhMe, p-TsOH, 12 h, 25 °C. b) Cr(CO)6, Bu2O/THF (10:1), reflux, 40 h. |