RE: ORGLIST:The same chemical structure, but different CAS#, why?

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From: Chapman, Robert D n/a (robert.chapman$##$navy.mil)
Date: Mon Nov 10 2003 - 12:35:05 EST

Borneol is the endo-2-hydroxy stereisomer (as you drew). Isoborneol is the exo-2-hydroxy isomer. The third CAS number is for that regioisomer but an unspecified stereoisomer. (The Aldrich catalog incorrectly associates the isomers and CAS numbers.)

Robert D. Chapman, Ph.D.
Chemistry & Materials Division (Code 4T4200D)
Naval Air Warfare Center
China Lake, CA 93555 USA

-----Original Message-----
From: Jiang Heng [mailto:hjiang78$##$hotmail.com]
Sent: November 08, 2003 18:33
To: everybody$##$orglist.net
Subject: ORGLIST:The same chemical structure, but different CAS#, why?

Hello, everybody,

The following substance is the same structure, but different CAS#, who can
tell me WHY?
CAS 124-76-5 (isoborneol)
CAS 507-70-0 (borneol)
CAS 464-45-9 (bicyclo[2.2.1]heptan-2-ol, 1,7,7-trimethyl)

see the attach file for the chemical structure.

Thanks

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