Journal of Organic Chemistry p. 8367 - 8370 (1995)
Update date:2022-08-16
Topics:
Choi, Woo-Baeg
Churchill, Hywyn R. O.
Lynch, Joseph E.
Volante, R. P.
Reider, Paul J.
Shinai, Ichiro
The dramatic difference in reactivity of the two diastereomeric acid esters 4A and 4B during decarboxylation has been thoroughly investigated.The (R) isomer 4A underwent decarboxylation to provide a 94:6 mixture of 5A and 5B at 80 deg C in 5-6 h.Under the same conditions the (S) isomer 4B did not undergo decarboxylation and with further heating to 120 deg C gave mainly the ring-opened decomposition product 6 along with unidentified decomposition products.A mechanistic rationale for this unusual reactivity profile is provided.
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