PROCESS FOR THE PREPARATION OF ALKYLATED DODECAHYDRO-NAPHTHO(2,1-B)FURANS
Alkylated dodecahydronaphtho[2,1-b]furans of the general formula I (I) where R1 and R2 are identical and each is hydrogen or methyl are prepared by reacting alkylated 2-hydroxydecahydronaphthalene-1-ethanol of the formula II (II) where R1 and R2 are as defined above, with a sulfonyl chloride in the...
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Main Authors | , , , |
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Format | Patent |
Language | English German |
Published |
15.05.1991
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Subjects | |
Online Access | Get full text |
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Summary: | Alkylated dodecahydronaphtho[2,1-b]furans of the general formula I (I) where R1 and R2 are identical and each is hydrogen or methyl are prepared by reacting alkylated 2-hydroxydecahydronaphthalene-1-ethanol of the formula II (II) where R1 and R2 are as defined above, with a sulfonyl chloride in the presence of basic catalysts by performing the cyclization in the presence of concentrated aqueous alkali metal hydroxides and a phase transfer catalyst, preferably a tetra-substituted ammonium or phosphonium salt, the sulfonyl chloride used preferably comprising a sulfonyl chloride of the general formula III R3-SO2Cl where R3 is C1-C3-alkyl or phenyl which may be substituted in the para position by methyl, chlorine, bromine or nitro. |
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Bibliography: | Application Number: EP19880115568 |