Bicyclo[4.2.0]octa-1,3,5-triene: 2-Mono-
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E. Peter Kündig; Celia Ferret; Bruno Rudolph
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Article
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1990
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John Wiley and Sons
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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