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. Author manuscript; available in PMC: 2018 Jun 21.
Published in final edited form as: J Am Chem Soc. 2017 Jun 12;139(24):8114–8117. doi: 10.1021/jacs.7b04374

Scheme 2.

Scheme 2

General catalytic mechanism and deuterium labelling studies.a

aYields of material isolated by silica gel chromatography. The extent deuterium incorporation was determined by HRMS and 1H and 2H NMR analysis. See Supporting Information for further experimental details. Haptomeric equilibria and equilibria involving alkoxy-bridged dimers are not depicted.