US PATENT SUBCLASS 558 / 310
.~.~.~.~ Nitrogen, or oxygen, and carbonyl carbon are adjacent ring members of the hetero ring (e.g., lactams, lactones, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
308  DF  .~.~ Processes for forming the cyano group {7}
309  DF  .~.~.~ Hetero ring containing reactant {1}
310.~.~.~.~ Nitrogen, or oxygen, and carbonyl carbon are adjacent ring members of the hetero ring (e.g., lactams, lactones, etc.)

DEFINITION

Classification: 558/310

(under subclass 309) Processes wherein oxygen, or nitrogen, and carbonyl carbon are adjacent ring members of the hetero ring.

(1) Note. Examples of processes provided for herein are: (a) the production of hydroxy capronitrile by the reastion of epsilon caprolactone with ammonia in vapor phase using zinc oxide catalyst, and (b) the production of phthalonitrile by catalytic reaction of ammonia and phthalimide.