510 Scientific Proceedings, Royal Dublin Society. 
by the fact that the well-crystallized acetobromoglucose of Konigs* 
gives a much more satisfactory yield of carvacrylglucoside than 
the corresponding syrupy chlorine compound, possibly due to the 
crystalline acetobromoglucose being a pure (3 compound. 
Michael’s method has been found generally applicable to the 
monatomic phenols, but not for the alcohols or polyatomic phenols. 
Fischer’s method, on the other hand, is generally applicable to the 
alcohols and polyatomic phenols, but unsuccessful in exactly those 
cases where Michael’s method succeeds. Acetobromoglucose can, 
however, as Kénigs has shown, be converted in the presence of 
silver carbonate into tetracetylmethylglucoside, and, as I have 
found into carvacrylglucoside, thus uniting the two series of gluco- 
sides by formation from a single parent substance by simple 
operations. 
It also follows from these facts that the bromine atom in aceto- 
bromoglucose is attached to the end carbon atom and its formula 
1s :— 
OAc 2D) 417 Qt eee 
irene) Ouvesl| 
CH,OAc. © OF EG 2 Cea 
| | | Peete 
H HO) OAc A (SER MmBE 
and that of acetochloroglucose formed from it by the action of 
silver chloride is— 
| | 
CH,OAc- GG | ¢g— \ — CH 
H H OAc H Cl 
OH 114 Hy (OF | 
CH,OH.- Geel op see Gy eng) Ses YG) Aer 
| | | | 
ae el «OME AEE 
BEC —= © 
and similar formulse are good for the cresylglucosides, but carvacryl- 
glucoside does not belong to the same series. It was obtained 
from carvacrol and potash by the action of acetochloroglucose, and 
Sitz. der k. Bayr. Akad. der Wissensch., 1900. p. 103. 
