ziqquratu
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Registered: 15-11-2002
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Defining stereochemical terms - pseudo and allo
Greetings all,
"Pseudo" and "allo" seem to be somewhat common (if no longer used) terms to describe the relative stereochemistry of certain natural products, but
finding a definition is proving difficult. While I've been able to make some educated guesses about their meaning, I need to be able to refer to
something a little more authoritative than my scribble pad!
If anyone can help me out - even if it's just suggestions for some books or sites that might point me in the right direction - I'd be extremely
grateful!
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DJF90
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Eliel's book/bible on stereochemisty would be my first place to start. If he doesn't have it in there, it doesnt exist.
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phlogiston
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Location: Neon Thorium Erbium Lanthanum Neodymium Sulphur
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From the IUPAC Compendium of Chemical Terminology, informally known as the Gold Book:
(http://goldbook.iupac.org/A00239.html)
| Quote: | | Amino acids with two chiral centres were named in the past by allotting a name to the first diastereoisomer to be discovered. The second
diastereoisomer, when found or synthesized, was then assigned the same name but with the prefix allo-. This method can be used only with trivial names
but not with semisystematic or systematic names. It is now recommended that allo should be used only for alloisoleucine and allothreonine.
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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