US PATENT SUBCLASS 548 / 172
.~.~.~.~.~.~.~.~ Nitrogen attached directly to chalcogen 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}
146  DF  .~.~.~ 1,3-thiazoles (including hydrogenated) {7}
148  DF  .~.~.~.~ Polycyclo ring system having the thiazole ring as one of the cyclos {3}
152  DF  .~.~.~.~.~ Bicyclo ring system having the thiazole ring as one of the cyclos {8}
165  DF  .~.~.~.~.~.~ Chalcogen bonded directly to ring carbon of the thiazole ring {5}
169  DF  .~.~.~.~.~.~.~ Chalcogen attached indirectly to the thiazole ring by nonionic bonding {2}
172.~.~.~.~.~.~.~.~ Nitrogen attached directly to chalcogen by nonionic bonding


DEFINITION

Classification: 548/172

(under subclass 169) Compounds in which nitrogen is attached directly to chalcogen by nonionic bonding.

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