US PATENT SUBCLASS 548 / 302.4
.~.~.~.~.~.~ The 1,3-diazole shares ring nitrogen with a five-membered ring having no additional hetero atoms (e.g., imidazo [2,1-a] isoindole, etc.)

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}
301.7  DF  .~.~.~.~ Polycyclo ring system having the diazole ring as one the cyclos {2}
302.1  DF  .~.~.~.~.~ Tricyclo ring system having the diazole ring as one the cyclos {1}
302.4.~.~.~.~.~.~ The 1,3-diazole shares ring nitrogen with a five-membered ring having no additional hetero atoms (e.g., imidazo [2,1-a] isoindole, etc.)

DEFINITION

Classification: 548/302.4

(under subclass 302.1) Compounds in which the tricyclo ring system contains a five-membered ring having one nitrogen and four carbons which nitrogen is shared with the 1,3-diazole ring.

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