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(0)C07D:32/33:

IPC6

SECTION C - CHEMISTRY; METALLURGY

HETEROCYCLIC COMPOUNDS

C07D

33/34

C07D503/00 - C07D513/22

503

/

00

Heterocyclic compounds containing 4-oxa-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula: , e.g. oxapenicillins, clavulanic acid derivatives; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring [6]

Preparation (by microbiological processes C 12 P 17/18) [6]

by forming the ring or condensed ring systems [6]

from compounds already containing the ring or condensed ring systems, e.g. by dehydrogenation of the ring, by introduction, elimination or modification of substituents [6]

Modification of a carboxyl group directly attached in position 2, e.g. esterification [6]

with a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2 [6]

unsubstituted in position 6 [6]

with hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, other than a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, attached in position 3 [6]

Radicals substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical [6]

by oxygen atoms [6]

by sulfur atoms [6]

by nitrogen atoms [6]

505

Heterocyclic compounds containing 5-oxa-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula: , e.g. oxacephalosporins; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring [6]

Preparation (by microbiological processes C 12 P 17/18) [6]

by forming the ring or condensed ring systems [6]

from compounds already containing the ring or condensed ring systems, e.g. by dehydrogenation of the ring, by introduction, elimination or modification of substituents [6]

Modification of a carboxyl group directly attached in position 2, e.g. esterification [6]

with a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2 [6]

substituted in position 7 [6]

with hetero atoms directly attached in position 7 [6]

Nitrogen atoms [6]

further acylated by radicals derived from carboxylic acids or by nitrogen or sulfur analogues thereof [6]

with the acylating radicals further substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen [6]

further substituted by singly-bound nitrogen atoms [6]

further substituted by doubly-bound nitrogen atoms [6]

507

Heterocyclic compounds containing a condensed beta-lactam ring system, not provided for by groups C 07 D 463/00, C 07 D 477/00 or C 07 D 499/00 to C 07 D 505/00; Such ring systems being further condensed [6]

containing 3-oxa-1-azabicyclo [3.2.0] heptane ring systems [6]

containing 2-oxa-1-azabicyclo [4.2.0] octane ring systems [6]

containing 3-oxa-1-azabicyclo [4.2.0] octane ring systems [6]

containing 4-oxa-1-azabicyclo [4.2.0] octane ring systems [6]

513

Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C 07 D 463/00, C 07 D 477/00 or C 07 D 499/00 to C 07 D 507/00 [2,6]

in which the condensed system contains two hetero rings [2]

Ortho-condensed systems [2]

Peri-condensed systems [2]

Bridged systems [2]

Spiro-condensed systems [2]

in which the condensed system contains three hetero rings [2]

Ortho-condensed systems [2]

Peri-condensed systems [2]

Bridged systems [2]

Spiro-condensed systems [2]

in which the condensed system contains four or more hetero rings [2]

33