US PATENT SUBCLASS 548 / 306.7
.~.~.~.~.~.~.~.~ Plural chalcogens attached directly to the diazole ring by nonionic bonding

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}
302.7  DF  .~.~.~.~.~ Bicyclo ring system having the diazole ring as one of the cyclos {2}
304.4  DF  .~.~.~.~.~.~ The other ring is a benzene ring {8}
306.4  DF  .~.~.~.~.~.~.~ Chalcogen bonded directly to ring carbon of the diazole ring {2}
306.7.~.~.~.~.~.~.~.~ Plural chalcogens attached directly to the diazole ring by nonionic bonding

DEFINITION

Classification: 548/306.7

(under subclass 306.4) Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are attached directly to carbon only or to carbon and nitrogen of the diazole ring by nonionic bonding.

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