US PATENT SUBCLASS 540 / 451
.~.~.~ Chalcogen double bonded directly to a ring carbon of the hetero ring which is adjacent to the ring nitrogen (e.g., laurolactam, etc.)

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

Internet Version by PATENTEC © 1999      Terms of Use


540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
450  DF  .~.~ The hetero ring contains at least eight members including nitrogen and carbon {9}
451.~.~.~ Chalcogen double bonded directly to a ring carbon of the hetero ring which is adjacent to the ring nitrogen (e.g., laurolactam, etc.) {7}
452  DF  .~.~.~.~> Heavy metal, aluminum, boron or silicon containing
453  DF  .~.~.~.~> Spiro
454  DF  .~.~.~.~> Chalcogen in the hetero ring {1}
460  DF  .~.~.~.~> Plural nitrogens in the hetero ring
461  DF  .~.~.~.~> Polycyclo ring system which contains the hetero ring as one of the cyclos {1}
463  DF  .~.~.~.~> Nitrogen or additional chalcogen attached directly to the hetero ring by nonionic bonding
464  DF  .~.~.~.~> Utilizing oximes, oxime salts, hydroxylamines, hydroxylamine salts or nitrosating agents to form the hetero ring (i.e., formation of the lactam ring)

DEFINITION

Classification: 540/451

(under subclass 450) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to a carbon of the hetero ring which is adjacent to the nitrogen.

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