| 41. | Historically, pyridine was produced from coal tar and as a byproduct of coal gasification.
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| 42. | Typically, such reactions are conducted in the presence of a base such as pyridine.
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| 43. | THF or pyridine ) through hydrogen bonding.
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| 44. | The reasoning behind this finding is that pyridine reacts with the intermediate sulfite replacing chlorine.
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| 45. | A chlorinated derivative of picolinic acid, picloram is in the pyridine family of herbicides.
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| 46. | Chichibabin pyridine synthesis of ammonia and allysine.
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| 47. | The fourth coordination site on the copper is saturated by an oppositely arranged pyridine nucleobase.
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| 48. | The 3-methoxy group is then cleaved to hydroxy, by reaction with pyridine.
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| 49. | Triphenylborane can be used to make triarylborane amine complexes, such as pyridine-triphenylborane.
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| 50. | It is produced by the reaction of sodium amide with pyridine, the Chichibabin reaction.
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