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- W2077814691 abstract "Addition of furan to methyl 4-(2,6-dimethoxyphenyl)-4-oxobut-2-ynoate (4; R = CO2Me) followed by hydrogenation of the adduct gave methyl 3-(2,6-dimethoxybenzoyl)-7-oxabicyclo[2.2.1]hept-2-ene-2-carboxylate (6; R = Me). This was demethylated to the corresponding 3-(2-hydroxy-6-methoxybenzoyl) derivative (6; R = H), which was cyclised by bases to give (a)(±)-methyl 2′α,5′α-epoxy-4-methoxy-3-oxogrisane-6′β-carboxylate (9; R = H), the structure of which was deduced chemically and spectroscopically, and unequivocally defined by X-ray crystallography, together with (b) the isomeric 6′α-carboxylate. Both grisanes were converted into (±)-methyl 2′α-hydroxy-3-oxogris-5′-ene-6′-carboxylate (11)." @default.
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- W2077814691 date "1976-01-01" @default.
- W2077814691 modified "2023-09-27" @default.
- W2077814691 title "The chemistry of fungi. Part LXIX. A new synthesis of the grisane system: X-ray crystallographic examination of (±)-methyl 5,7-di-bromo-2′α,5′α-epoxy-4-methoxy-3-oxogrisane-6′β-carboxylate" @default.
- W2077814691 doi "https://doi.org/10.1039/p19760001369" @default.
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