2,3-Dichloro-5-iodopyridine and methods of making and using the

Details 2,3-Dichloro-5-iodopyridine and methods of making and using the 2,3-Dichloro-5-iodopyridine and methods of making and using the

1983-09-06

1985-05-14

Brust, Joseph Paul

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546345, C07D21361

Patent

active

045173680

ABSTRACT:
The novel compound 2,3-dichloro-5-iodopyridine is prepared by chlorinating 3-chloro-5-iodo-2-pyridinol or by lithiating 2-bromo-2,3-dichloropyridine at a reduced temperature and thereafter iodinating the thus produced lithiopyridine. The compound 2,3-dichloro-5-iodopyridine is useful as a chemical intermediate in the preparation of pyridyloxyphenoxypropionic acids, and esters and amides thereof, which are valuable herbicides. The 2,3-dichloro-5-lithiopyridine and 3-chloro-5-iodo-2-pyridinol intermediates are also novel.

REFERENCES:
patent: 4046553 (1977-09-01), Takahashi et al.
patent: 4327216 (1982-04-01), Martin
Gribble et al., Tetrahedron Letters, vol. 21, pp. 4137-4140.

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