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Regioselective functionalization of 3-oxygenated estra-1,3,5(10)-trienes AT C-1 VIA (η6-arene)Cr(CO)3 complexes

✍ Scribed by Hermann Künzer; Manfred Thiel


Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
239 KB
Volume
29
Category
Article
ISSN
0040-4039

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Bicyclo[4.2.0]octa-1,3,5-triene: 2-Mono-
✍ E. Peter Kündig; Celia Ferret; Bruno Rudolph 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 German ⚖ 680 KB

The order of directing ability is modified on complexation, the most remarkable change being the high efficiency of the F-group. The AB system of H-C(4) and H-C(5) of 4 overlaps with a signal associated with 3 (4.61 ppm). When the lithiation was carried out at -40°, 7 YO of 4 and 82 % of 3 were for