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. Author manuscript; available in PMC: 2018 Dec 5.
Published in final edited form as: J Am Chem Soc. 2018 May 24;140(25):8020–8026. doi: 10.1021/jacs.8b04530

Scheme 5. Derivatizations of phosphonium salt isomersa,b.

Scheme 5.

aIsolated yields are shown and ratios are reported as in Table 1.bThe minor isomer is a 2-position pyridine phosphonium salt.