By Klaus Florey (Ed.)
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Extra resources for Analytical Profiles of Drug Substances, Vol. 13
The camphor o i l which accumulates i n t h e condensing v e s s e l s i s u s u a l l y emptied once a month. About 113 of t h e pure camphor, pres e n t i n t h e o i l i s c r y s t a l i z e d out and it i s s e p a r a t e d from t h e l i q u i d by s t r a i n i n g . The camphor remaining i n t h e o i l i s recovered e i t h e r by f r a c t i o n a l d i s t i l l a t i o n o r by f r e e z i n g out or by t h e formation o f complexes w i t h t h e s t r o n g acids. I.. .. U .. ..
4 O p t i c a l R o t a t i o n Camphor o c c u r s i n n a t u r e i s o p t i c a l l y a c t i v e ( d a n d l f o r m s ) , whereas t h e s y n t h e t i c camphor i s i n racemic from. The following o p t i c a l r o t a t i o n s were r e p o r t e d . f o r (+)-Camphor. [a]," Solvent [a]:? + 4 1 t o 4 3 O [a]:' Ref. 200 90% Alcohol ( C = 5 i n 1 0 0 m l ) . 5 in 100 m l ) (2) The s p e c i f i c r o t a t i o n of camphor a s 5% s o l u t i o n i n chloroform has been determined by u s i n g a P e r k i n Elmer Polarmatic Model 2 4 1 MC and found t o be : 2 - 5 Crystal Structure A l l e n and Rogers (18) have redetermined t h e c r y s t a l t o elucidate i t s s t r u c t u r e of ( + ) -3-bromocamphor a b s o l u t e s t e r e o c h e m i s t r y and which i s known t o have t h e same s t e r e o c h e m i s t r y o f (+)-camphor.
5. &8aplar, 2. hunC H. Eofman, J. Kuftinec, PI. Bkreblin, F. Kajfez, A. ITa I, IT. Blazev i 6 , Acta Pharm. , 2 ( 2 ) , 1983) i n press, 6. EfidBreitmaier, 'iJ. Jeinheim, 1978. 2 7. E. F'Jarmo, Drugs Bcptl. Clin. Ses. 6 , 639 (1980). 8. %. F. Poole, J. -Zlatkis, J. , Chromatogr. Commun. E. Poet, J. , 2, 336 (1981). iJ. G. G B r g , W r o J. Drug Metab. Pharmacokinetics, 81 (19827. S. Rubin, P. 1W. S c o t t , K. McLean, A. Pearson, 5, . ATENOLOL . 25 D. L. 235 (1982)- Reid, Br. J. c l i n . Pharmac.