IT1100499B - 1,1'-Di:alkyl-4,4'-bi:pyridylium di:halide prepn. - by reacting 4,4'-bi:pyridyl with alpha-halo acid while heating in water, until pH is below 4 - Google Patents
1,1'-Di:alkyl-4,4'-bi:pyridylium di:halide prepn. - by reacting 4,4'-bi:pyridyl with alpha-halo acid while heating in water, until pH is below 4Info
- Publication number
- IT1100499B IT1100499B IT2999778A IT2999778A IT1100499B IT 1100499 B IT1100499 B IT 1100499B IT 2999778 A IT2999778 A IT 2999778A IT 2999778 A IT2999778 A IT 2999778A IT 1100499 B IT1100499 B IT 1100499B
- Authority
- IT
- Italy
- Prior art keywords
- alkyl
- alpha
- reacting
- prepn
- heating
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 2
- 239000002253 acid Substances 0.000 title 1
- 150000004820 halides Chemical class 0.000 title 1
- 125000001475 halogen functional group Chemical group 0.000 title 1
- 125000004076 pyridyl group Chemical group 0.000 title 1
- 150000001350 alkyl halides Chemical class 0.000 abstract 2
- -1 alkyl sulphates Chemical class 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- MWVTWFVJZLCBMC-UHFFFAOYSA-N 4,4'-bipyridine Chemical group C1=NC=CC(C=2C=CN=CC=2)=C1 MWVTWFVJZLCBMC-UHFFFAOYSA-N 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 239000003085 diluting agent Substances 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 230000002363 herbicidal effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 150000007524 organic acids Chemical class 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 abstract 1
Landscapes
- Pyridine Compounds (AREA)
Abstract
Prepn. of herbicidal 1,1-dialkyl-4,4'-bipyridylium dihalide (I) comprises reacting reacting 4,4'-bipyridyl (II) with an alpha-halogen substd. organic acid of formula XR1COOH (III) while heating in the presence of water, and terminating the reaction at pH =4.0. In (III) R1 is 1-3C alkyl substd. by X in the alpha-posn.; and X is Cl or Br. Process avoids the use of alkyl halides or alkyl sulphates, does not require organic diluents and provides conversions of >=95%. The prod. obtd. does not require purification. Reaction time is considerably shorter than when using alkyl halides or alkyl sulphates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2999778A IT1100499B (en) | 1978-11-21 | 1978-11-21 | 1,1'-Di:alkyl-4,4'-bi:pyridylium di:halide prepn. - by reacting 4,4'-bi:pyridyl with alpha-halo acid while heating in water, until pH is below 4 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2999778A IT1100499B (en) | 1978-11-21 | 1978-11-21 | 1,1'-Di:alkyl-4,4'-bi:pyridylium di:halide prepn. - by reacting 4,4'-bi:pyridyl with alpha-halo acid while heating in water, until pH is below 4 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7829997A0 IT7829997A0 (en) | 1978-11-21 |
| IT1100499B true IT1100499B (en) | 1985-09-28 |
Family
ID=11228824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT2999778A IT1100499B (en) | 1978-11-21 | 1978-11-21 | 1,1'-Di:alkyl-4,4'-bi:pyridylium di:halide prepn. - by reacting 4,4'-bi:pyridyl with alpha-halo acid while heating in water, until pH is below 4 |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1100499B (en) |
-
1978
- 1978-11-21 IT IT2999778A patent/IT1100499B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT7829997A0 (en) | 1978-11-21 |
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