US PATENT SUBCLASS 544 / 224
.~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.)


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



544 /   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 having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224.~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
225  DF  .~.~.~.~> Heavy metal or aluminum containing {2}
229  DF  .~.~.~.~> Boron or silicon containing
230  DF  .~.~.~.~> Spiro {1}
232  DF  .~.~.~.~> Phosphorus attached directly or indirectly to a 1,2-diazine ring by nonionic bonding
233  DF  .~.~.~.~> Polycyclo ring system having a 1,2-diazine ring as one of the cyclos {2}
238  DF  .~.~.~.~> 1,2-diazines which contain an additional hetero ring
239  DF  .~.~.~.~> Chalcogen bonded directly to ring carbon of a 1,2-diazine ring {2}
242  DF  .~.~.~.~> 1,3-diazines {10}
336  DF  .~.~.~.~> 1,4-diazines {9}


DEFINITION

Classification: 544/224

The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.):

(under subclass 1) Compounds in which the six-membered hetero ring consists of two ring nitrogens and four ring carbons.