Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom

CCHEMISTRY METALLURGY C07Organic chemistry C07DHETEROCYCLIC COMPOUNDS

C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom

C07D307/02not condensed with other rings C07D307/04having no double bonds between ring members or between ring members and non-ring members C07D307/06with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms C07D307/08Preparation of tetrahydrofuran C07D307/10with substituted hydrocarbon radicals attached to ring carbon atoms C07D307/12Radicals substituted by oxygen atoms C07D307/14Radicals substituted by nitrogen atoms not forming part of a nitro radical C07D307/16Radicals substituted by carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen C07D307/18with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/20Oxygen atoms C07D307/22Nitrogen atoms not forming part of a nitro radical C07D307/24Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/26having one double bond between ring members or between a ring member and a non-ring member C07D307/28with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms C07D307/30with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/32Oxygen atoms C07D307/33in position 2, the oxygen atom being in its keto or unsubstituted enol form C07D307/34having two or three double bonds between ring members or between ring members and non-ring members C07D307/36with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms C07D307/38with substituted hydrocarbon radicals attached to ring carbon atoms C07D307/40Radicals substituted by oxygen atoms C07D307/42Singly bound oxygen atoms C07D307/44Furfuryl alcohol C07D307/45Oxygen atoms acylated by a cyclopropane containing carboxylic acyl radical C07D307/46Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom C07D307/48Furfural C07D307/50Preparation from natural products C07D307/52Radicals substituted by nitrogen atoms not forming part of a nitro radical C07D307/54Radicals substituted by carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen C07D307/56with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/58One oxygen atom C07D307/60Two oxygen atoms C07D307/62Three oxygen atoms C07D307/64Sulfur atoms C07D307/66Nitrogen atoms C07D307/68Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/70Nitro radicals C07D307/71attached in position 5 C07D307/72with hydrocarbon radicals, substituted by nitrogen-containing radicals, attached in position 2 C07D307/73by amino or imino, or substituted amino or imino radicals C07D307/74by hydrazino or hydrazono or such substituted radicals C07D307/75having carboxylic acyl radicals or their thio or nitrogen analogues directly attached to the hydrazino or hydrazono radical C07D307/76having carbonic acyl radicals or their thio or nitrogen analogues directly attached to the hydrazino or hydrazono radical C07D307/77ortho- or peri-condensed with carbocyclic rings or ring systems C07D307/78Benzo [b] furans Hydrogenated benzo [b] furans C07D307/79with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals directly attached to carbon atoms of the hetero ring C07D307/80Radicals substituted by oxygen atoms C07D307/81Radicals substituted by nitrogen atoms not forming part of a nitro radical C07D307/82with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/83Oxygen atoms C07D307/84Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen C07D307/85attached in position 2 C07D307/86with an oxygen atom directly attached in position 7 C07D307/87Benzo [c] furans Hydrogenated benzo [c] furans C07D307/88with one oxygen atom directly attached in position 1 or 3 C07D307/8853,3-Diphenylphthalides C07D307/89with two oxygen atoms directly attached in positions 1 and 3 C07D307/90with an oxygen atom in position 1 and a nitrogen atom in position 3, or vice-versa C07D307/91Dibenzofurans Hydrogenated dibenzofurans C07D307/92Naphthofurans Hydrogenated naphthofurans C07D307/93condensed with a ring other than six-membered C07D307/935Not further condensed cyclopenta [b] furans or hydrogenated cyclopenta [b] furans C07D307/937with hydrocarbon or substituted hydrocarbon radicals directly attached in position 2 C07D307/94spiro-condensed with carbocyclic rings or ring systems