Chemical Communications

Tether-enforced reversal of regioselectivity: head-to-head [4+ 4] photocycloaddition of 2-pyridones

SMN Sieburth, B Siegel

文献索引：Sieburth, Scott McN.; Siegel, Brian Chemical Communications, 1996 , # 19 p. 2249 - 2250

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摘要

Symmetric 3, 3′-attachment of a three-atom chain between two pyridones overrides the head-to-tail regioselectivity found in intermolecular photodimerization reactions and gives a nearly quantitative yield of the head-to-head [4+ 4] cycloadduct containing contiguous quaternary centres.