CHAMAECYPARIS OIL

CHAMAECYPARIS OIL


Chamaecyparis obtusa, the hinoki tree which is extensively grown in Japan, furnishes a valuable timber wood, and the tree thrives well in the mountainous districts of Formosa. Uchida2 has examined a sample of the crude oil obtained by the dry distillation of the wood in Formosa.
It is a reddish-brown mobile liquid possessing a woody and empyreumatic smell and containing tarry matter. The yield was 2,4 per cent, of the wood. The rectified oil obtained by distillation with steam was lemon yellow in colour, and after treatment with sodium carbonate solution to remove pyroligneous acids it had a specific gravity of 0,8821, refractive index, 1,4990, and specific rotation + 50,37° in chlordform solution. The constituents identified were D-α-pinene and cadinene, with a small amount of oxygenated compounds, the amount of terpenes being about 70 per cent., and that of the sesquiterpenes about 24 per cent.
The leaves of Chamaecyparis lawsoniana yield about 1 per cent, of oil having the following characters :
Specific gravity 0-9308
Optical rotation + 23° 48'
Refractive index 1,4884
Acid value           3,7
Ester                  61,6
(after acetylation) 78,8
The oil contains laurinic aldehyde.
The oil distilled from the wood of Chamaecyparis lawsoniana and rectified by steam has been examined by Schorger.1 The oil has the ollowing characters:
Specific gravity           0,8905
Refractive i n d e x      1,4758 at 15°
Optical rotation           + 39,6°
Acid value                  0-3
Ester                           32,8
(after a c e t y l a t i o n ):  71,6
The oil behaved as follows on fractional distillation :
(760 mm) 155° to 157°................60.5 per cent
        “        157° to 170°................3.5 per cent
        “        170o to180o..................4.0 per cent
 (15 mm) 100° to 130°................20.5 per cent
         “        130o to160o..................7.0 per cent
         “        160o to190o..................1.0 per cent
The oil contains D-α-pinene to the extent of 60 per cent., dipentene (6 to7 per cent.), L-borneol (11 per cent.), cadinene (6 to 7 per cent.), formic and acetic acids in the free state, and formic and capric acids as esters.
---------------------------

1Jour. Amer. Chem. Soc., 33, 755. 2Jour. Amer. Chem. Soc. (1916),

0 Comment:

Post a Comment

 
© Pharmacognosy | Plants | herbal | herb | traditional medicine | alternative | Botany | © Copyright 2012 ; Email: epharmacognosy@gmail.com