Residues of 4-amino-3,5,6-trichloropicolinic acid in grass from applications of Tordon herbicides
✍ Scribed by Getzendaner, Milton E.; Herman, J. L.; Van Giessen, Bart
- Book ID
- 126968840
- Publisher
- American Chemical Society
- Year
- 1969
- Tongue
- English
- Weight
- 509 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0021-8561
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## Abstract Pentachloropyridine serves as a key intermediate in the synthesis of 4‐amino‐3,5,6‐trichloropicolinic acid (picloram) and 4‐amino‐3,6‐dichloropicolinic acid (aminopyralid). An M+3 stable isotope of pentachloropyridine (1, pentachloropyridine‐1‐^15^N‐2,6‐^13^C~2~) was prepared from K^13^
## Abstract A highly efficient, seven‐step route has been developed for the preparation of 2,6‐[^14^C~2~]‐4‐amino‐3,5,6‐trichloropicolinic acid ([^14^C~2~]‐1, 2,6‐[^14^C~2~]‐picloram) from 2,6‐[^14^C~2~]‐pentachloropyridine. The method involves the stepwise, highly selective and high yield introduc