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. Author manuscript; available in PMC: 2017 Mar 23.
Published in final edited form as: J Am Chem Soc. 2016 Mar 9;138(11):3659–3662. doi: 10.1021/jacs.6b01187

Scheme 4.

Scheme 4

Scope of the reactiona

aReaction conditions: 0.20 mmol 1, 0.24 mmol 3, 10 mol% (R,R)-ProPhenol, 20 mol% Et2Zn (1M in hexanes), 3 A molecular sieves (5 mg), in THF (1.0 M) at 80°C for 16 h. b8:1 d.r. before chromatography. c2.6:1 d.r. before chromatography. cReaction run in Et2O (1.0 M).