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. Author manuscript; available in PMC: 2018 Sep 27.
Published in final edited form as: Chem Rev. 2017 Jun 5;117(18):11894–11951. doi: 10.1021/acs.chemrev.7b00022

Figure 47.

Figure 47

(A) Bromination of 238 by N-chloroamide (293) under visible light irradiation conditions revealed preference for C2-equatorial bromination (294). (B) This C2-equatorial selectivity is also observed for chlorination to yield 297, which is further utilized in the total synthesis of 295.244,246