US PATENT SUBCLASS 548 / 335.1
.~.~.~.~ Two double bonds between ring members of the diazole ring (i.e., imidazole)

Current as of: June, 1999
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548 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
300.1  DF  .~.~.~ 1,3-diazoles (including hydrogenated) {9}
335.1.~.~.~.~ Two double bonds between ring members of the diazole ring (i.e., imidazole) {7}
335.5  DF  .~.~.~.~.~> Nitrogen attached indirectly to the diazole ring by acyclic nonionic bonding {4}
341.1  DF  .~.~.~.~.~> Chalcogen attached indirectly to the diazole ring by acyclic nonionic bonding {3}
343.1  DF  .~.~.~.~.~> Halogen attached directly or indirectly to the diazole ring by acyclic nonionic bonding
343.5  DF  .~.~.~.~.~> Benzene ring bonded directly to the diazole ring
344.1  DF  .~.~.~.~.~> The diazole ring and two benzene rings are bonded directly to the same acyclic carbon
345.1  DF  .~.~.~.~.~> Cycloaliphatic ring bonded directly to the diazole ring
346.1  DF  .~.~.~.~.~> Benzene ring attached indirectly to the diazole ring by acyclic nonionic bonding

DEFINITION

Classification: 548/335.1

(under subclass 300.1) Compounds wherein the 1,3-diazole ring contains two double bonds between its ring members.

(1) Note. This subclass contains, for example: [figure]

(2) Note. Compounds within this subclass are referred to as imidazoles, glyoxalines, imineazoles, imideazoles, iminazoles, pyrro[b]monazoles, or 1,3-diaza-2,4-

cyclopentadienes.