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. 2008 Apr 14;25(4):719–737. doi: 10.1039/b706296f

Scheme 23. Porco's branching strategy from the Michael adduct 85. Reagents and conditions: (1) Zn, AcOH–THF, then Na2CO3 (aq.) [R1 = C Created by potrace 1.16, written by Peter Selinger 2001-2019 CMe, R2 = H], 92%; (2) Grubbs' 1st-gen. cat., ethylene, MW, 150 W, 50 °C, CH2Cl2 [R1 = allyl, R2 = C Created by potrace 1.16, written by Peter Selinger 2001-2019 CCH2OMe], ≥86%; (3) Co2(CO)8, MW, 150 W, 80 °C, CH2Cl2 [R1 = C Created by potrace 1.16, written by Peter Selinger 2001-2019 CH, R2 = allyl], 67%.

Scheme 23