US PATENT SUBCLASS 558 / 374
.~.~.~.~.~ The carbon of the second reactant is bonded directly to two atoms which are each double or triple bonded to noncarbon atoms

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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}
357  DF  .~.~ Processes of forming carbon to carbon bond between carbons of two organic reactants {12}
371  DF  .~.~.~ Aldehyde or ketone reactant {2}
373  DF  .~.~.~.~ Carbonyl carbon of the aldehyde or ketone reacts to form a carbon to carbon double bond with carbon of a second reactant {1}
374.~.~.~.~.~ The carbon of the second reactant is bonded directly to two atoms which are each double or triple bonded to noncarbon atoms

DEFINITION

Classification: 558/374

(under subclass 373) Processes wherein the carbon of the second reactant is bonded directly to two atoms, each of which is double or triple bonded to noncarbon atoms.

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