The Wittig Reaction of Benzofuran-2, 3-diones

The Wittig reaction of benzofuran-2, 3-diones (2), cyclic α-ketoesters, was examined. The reaction of 2 having an electron-donating substituent on the aromatic ring with a stable ylide afforded not 3-alkylidene-2(3H)-benzofuranones (4) but 2-alkylidene-3(2H)-benzofuranones (1) with high regioselecti...

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Veröffentlicht in:	Chemical & pharmaceutical bulletin 1990/08/25, Vol.38(8), pp.2265-2267
Hauptverfasser:	TAKEUCHI, Yasuo, CHOSHI, Tominari, TOMOZANE, Hideo, YOSHIDA, Hirokazu, YAMATO, Masatoshi
Format:	Artikel
Sprache:	eng
Schlagworte:	benzofuran-2, 3-dione Chemistry Exact sciences and technology Heterocyclic compounds Heterocyclic compounds with o, s, se, te hetero atom and condensed derivatives Organic chemistry Preparations and properties regioselectivity Wittig reaction α-ketoester
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Zusammenfassung:	The Wittig reaction of benzofuran-2, 3-diones (2), cyclic α-ketoesters, was examined. The reaction of 2 having an electron-donating substituent on the aromatic ring with a stable ylide afforded not 3-alkylidene-2(3H)-benzofuranones (4) but 2-alkylidene-3(2H)-benzofuranones (1) with high regioselectivity.
ISSN:	0009-2363 1347-5223
DOI:	10.1248/cpb.38.2265