COMMUNICATIONS
Yijin Su et al.
perature, the reaction was quenched by adding H2O. After
extraction by EtOAc, the organic phase was washed with
brine and dried over NaSO4, then concentrated. The crude
product was purified by column chromatography (hexane:E-
tOAc=8:1) to give 7a; yield: 169.5 mg (86%).
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We thank the following funding agencies NSF (CHE-
0844602, CHE-1149367, CHE-1228336) and NSFC (No.
21228204) for financial support.
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Adv. Synth. Catal. 2014, 356, 692 – 696