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. Author manuscript; available in PMC: 2019 Mar 7.
Published in final edited form as: European J Org Chem. 2017 Dec 28;2018(9):1075–1096. doi: 10.1002/ejoc.201701579

Table 1.

Effect of nitrile solvent ratio on stereoselectivity.

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Entry Solvent (v/v) Yield (%) of 437 β:α ratio
1 EtCN/CH2Cl2 0:100 81 6:1
2 EtCN/CH2Cl2 5:95 80 8:1
3 EtCN/CH2Cl2 100:0 <10 >5:1