Organic letters

Use of 4-cyanocoumarins as dienophiles in a facile synthesis of highly substituted dibenzopyranones

ME Jung, DA Allen

文献索引：Organic Letters, , vol. 11, # 3 p. 757 - 760

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被引用次数: 25

摘要

... Volume: Page: ... Organic Letters. ... figure Scheme 1. The 4-cyanocoumarin 5 was prepared in two steps without purification from the commercially available 4-hydroxycoumarin 3 (Scheme 2). Bromination with Bu 4 NBr/P 2 O 5 (11) followed by cyanation with CuCN ...