US PATENT SUBCLASS 546 / 272.7
.~.~.~.~.~ 1,3-diazoles (including hydrogenated)

Current as of: June, 1999
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546 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
268.1  DF  .~.~.~ Additional hetero ring containing {4}
268.4  DF  .~.~.~.~ The additional hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen {9}
272.7.~.~.~.~.~ 1,3-diazoles (including hydrogenated) {5}
273.1  DF  .~.~.~.~.~.~> Polycyclo ring system having the 1,3-diazole ring as one of the cyclos {1}
274.1  DF  .~.~.~.~.~.~> The 1,3-diazole ring is bonded directly to the six-membered hetero ring
274.4  DF  .~.~.~.~.~.~> Chalcogen attached directly to the 1,3-diazole ring by nonionic bonding
274.7  DF  .~.~.~.~.~.~> Nitrogen or -C(=X)-, wherein X is chalcogen, attached directly to the 1,3-diazole diazole ring by nonionic bonding
275.1  DF  .~.~.~.~.~.~> Chalcogen attached indirectly to the 1,3-diazole ring by acyclic nonionic bonding

DEFINITION

Classification: 546/272.7

1,3-diazoles (including hydrogenated):

(under subclass 268.4) Compounds in which the five-membered hetero ring has nitrogens in the 1- and 3-positions and carbons in the remaining three positions.

(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members: [figure]