US PATENT SUBCLASS 548 / 226
.~.~.~.~.~ Plural chalcogens bonded directly to ring carbons of the oxazole ring

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}
215  DF  .~.~.~ 1,3-oxazoles (including hydrogenated) {6}
225  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the oxazole ring {3}
226.~.~.~.~.~ Plural chalcogens bonded directly to ring carbons of the oxazole ring {1}
227  DF  .~.~.~.~.~.~> Chalcogens bonded directly at 2- and 5-positions of the oxazole ring

DEFINITION

Classification: 548/226

(under subclass 225) Compounds wherein at least two chalcogens (i.e, oxygen, sulfur, selenium, or tellurium) are bonded directly to ring carbons of the oxazole ring.

(1) Note. An example of a compound provided for herein is: [figure]