Assertion: starting pyridine | /r/HasProperty | substituted in the 4-position
Facets:
value: by a leaving group
type: OTHER
Source sentences:
text: These objects have been achieved by providing a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is quaternized, comprising, quaternizing the starting pyridine, with acrylamide, N-monoalkylacrylamide or N-dialkylacrylamide under effective acidic conditions; subjecting the resultant, corresponding quaternized starting pyridine to a nucleophilic displacement reaction with a reagent which reacts to produce the corresponding 4-substituted pyridine; and dequaternizing the latter under effective basic conditions to liberate the desired 4-substituted pyridine product.
text: Accordingly, this invention, for example, also relates to a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is in quaternized form, comprising,
text: These objects have been achieved by providing a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is quaternized, comprising, quaternizing the starting pyridine, with acrylamide, N-monoalkylacrylamide or N-dialkylacrylamide under effective acidic conditions; subjecting the resultant, corresponding quaternized starting pyridine to a nucleophilic displacement reaction with a reagent which reacts to produce the corresponding 4-substituted pyridine; and dequaternizing the latter under effective basic conditions to liberate the desired 4-substituted pyridine product.
text: Accordingly, this invention, for example, also relates to a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is in quaternized form, comprising,
text: These objects have been achieved by providing a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is quaternized, comprising, quaternizing the starting pyridine, with acrylamide, N-monoalkylacrylamide or N-dialkylacrylamide under effective acidic conditions; subjecting the resultant, corresponding quaternized starting pyridine to a nucleophilic displacement reaction with a reagent which reacts to produce the corresponding 4-substituted pyridine; and dequaternizing the latter under effective basic conditions to liberate the desired 4-substituted pyridine product.
text: Accordingly, this invention, for example, also relates to a process for preparing a 4-substituted pyridine product from a starting pyridine substituted in the 4-position by a leaving group susceptible to nucleophilic displacement when the starting pyridine is in quaternized form, comprising,