US PATENT SUBCLASS 548 / 356.1
.~.~.~ 1,2-diazoles (including hydrogenated)

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}
356.1.~.~.~ 1,2-diazoles (including hydrogenated) {8}
356.5  DF  .~.~.~.~> Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- or 10- positions (e.g., anthrone, anthraquinone, etc.) {1}
357.5  DF  .~.~.~.~> Spiro
358.1  DF  .~.~.~.~> Polycyclo ring system having the diazole ring as one of the cyclos {3}
364.1  DF  .~.~.~.~> Additional hetero ring attached directly or indirectly to the diazole ring by nonionic bonding {3}
366.1  DF  .~.~.~.~> Chalcogen bonded directly to ring carbon of the diazole ring {7}
371.4  DF  .~.~.~.~> Nitrogen attached directly to the diazole ring by nonionic bonding {3}
373.1  DF  .~.~.~.~> Two double bonds between ring members of the diazole ring (i.e., pyrazole) {4}
379.1  DF  .~.~.~.~> One double bond between ring memebers of the diazole ring (i.e., pyrazoline) {2}

DEFINITION

Classification: 548/356.1

(under subclass 100) Compounds wherein nitrogen atoms occupy the 1 and 2 positions and carbon atoms occupy the remaining three positions of the five-membered hetero ring.

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

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

(3) Note. Compounds within this subclass are generally referred to as tetrahydropyrazoles or pyrazolidines.