Fujita R, Oikawa K, Yoshisuji T, Okuyama Y, Nakano H, Matsuzaki H. Cycloadditions of 1-substituted 1,3-butadienes with 4- or 3-substituted 2(1H)-quinolones acting as dienophiles.
Chem Pharm Bull (Tokyo) 2003;
51:295-300. [PMID:
12612414 DOI:
10.1248/cpb.51.295]
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Abstract
Cycloadditions of 1,3-butadiene derivatives having an electron-rich group at the 1-position with 4- or 3-substituted 2(1H)-quinolones were carried out to give the richly functionalized phenanthridines under both atmospheric and high pressure conditions. Furthermore, the reactivity of 4- or 3-substituted 2(1H)-quinolones acting as a dienophile with 1-substituted dienes was examined using MO calculation.
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