Norcamphor
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Journal of Organic Chemistry, 1968, 33(9):3425-3428.
Anomalous sodium hydride reduction of norcamphor and 5-norbornen-2-one[Reference:
WebLink]
METHODS AND RESULTS:
Norcamphor and 5-norbornen-2-one both gave significant yields of reduction products (methyl ethers) when treated with sodium hydride and methyl iodide in glyme. Thus, Norcamphor (I) gave 2-methoxynorbornane (II, 10% yield), 3-methyl-2-methoxynorbornane (III, 22%), 3-methylNorcamphor (IV, 27%), 3,3-dimethyl-2-methoxynorbornane (V, 1.4%), and 3,3-dimethylNorcamphor (VI, 38%). 5-Norbornen-2-one (VII) gave endo-and exo-2-methoxy-5-norbornene (VIII, 63%) and 3-methyl-2-methoxy-5-norbornene (IX, 32%). With excess ketone in the latter case, 3-methyl-5-norbornen-2-one (X) was also formed.
METHODS AND RESULTS:
It was shown that the carbonyl is the species being reduced and not the O-alkylation products, 2-methoxynorbornene and 2-methoxynorbornadiene. Possible reasons why these ketones are so easily reduced are suggested.
