METHOD OF SYNTHESIS OF 5-SUBSTITUTED 2-CHLOROPYRIDINE Russian patent published in 2000 - IPC

Abstract RU 2154060 C2

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method of synthesis of 5-substituted 2-chloro-pyridine of the formula (I) where R means unsubstituted or substituted alkyl or aralkyl. Method involves interaction of acetenamide of the formula (II) where R has the above indicated values, R1 means C1-C4-alkyl or aryl-(C1-C4)-alkyl with Filsmayer's reagent forming in reaction of formamide of the formula R2R3-NC(O)H where R2 and R3 mean direct or branched cyclic C4-C8-alkyl with chlorinating agent followed by removal of excess of chlorinating agent by distillation off and addition of dialkylformamide from reaction mixture after termination of Filsmayer's reagent intercation with acetenamide of the formula (II). Compound of the formula (I) is used as an intermediate substance for insecticide producing. EFFECT: increased yield of end product, decreased formation of by-side compounds. 6 cl, 1 ex

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RU 2 154 060 C2

Authors

Klaus Jelikh

Khans Lindel'

Kristof Mannkhajms

Rajnkhard Lantsh

Val'Ter Merts

Dates

2000-08-10Published

1996-01-18Filed