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. Author manuscript; available in PMC: 2022 May 7.
Published in final edited form as: Angew Chem Int Ed Engl. 2016 Jan 28;55(9):3077–3080. doi: 10.1002/anie.201510909

Table 2.

Reductive bromination of trityl hydrazones.

graphic file with name nihms768904u3.jpg
hydrazone bromide yield[b] dr[c]
11a graphic file with name nihms768904t21.jpg 16a
65%		 -
11d graphic file with name nihms768904t22.jpg 16d
69%		 2.5:1
11e graphic file with name nihms768904t23.jpg 16e
49%		 1.1:1
11h graphic file with name nihms768904t24.jpg 16h
60%		 17:1
[a]

NBS solubilized in THF.

[b]

Isolated yields.

[c]

Diastereomeric ratio (dr) determined by 1H NMR of purified bromides.