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. Author manuscript; available in PMC: 2018 May 19.
Published in final edited form as: Org Lett. 2017 May 3;19(10):2630–2633. doi: 10.1021/acs.orglett.7b00961

Table 2.

Optimization Studies for the Reductive Cleavage of Cyclic Hydrazines.a

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entry amount of TFA yield of 30 over three steps from 21 (%)
1 2 equiv 37
2 15 volume % 50
3 100 volume % 22