BIXIN 



Solvent Absorption maxima 



Carbon disulphide 455 429 m.u 



Chloroform 435 410 m/x 



271 



Labile apo-i-norbixinal methyl ester CjsHggOj: 



Karrer and Solmssen^^ subjected labile bixin to controlled permanganate 

 degradation and obtained 3 different aldehydes which were identified as apo-i-, 

 apo-2-, and apo-3-norbixinal methyl ester*. Apo-i-norbixinal methyl ester is 

 obtained in the largest yield. M.p. 156°. Oxime, m.p. iS6°. Semicarbazone, m.p 

 about 225°. 



Solvent Absorption maxima 



Carbon disulphide 505 475 ra/j. 



Petroleum ether 470 441 m/j, 



Ethanol about 484 m/z 



A bsorption maxima of the oxime 



Carbon disulphide 501 470 m// 



Ethanol 479 448 m/x 



Absorption maxima of the sem,icarbazone 



Carbon disulphide 515 487 m/z 



, Ethanol 487 460 m^ 



Labile apo-2-norbixinal methyl ester CjuHj^Og: 



This compound was only formed in very small amounts^^ and could not be 

 obtained in a crystalline state. 



Solvent Absorption maxima 



Carbon disulphide 479.5 449 mjx 



Petroleum ether 446.5 421 rafj, 



Ethanol wide bands 



Absorption maxima of the oxime 



Carbon disulphide 478 449 m/n 



Ethanol 456 m/z 



Petroleum ether 447 m/x 



Absorption maxima of the semicarbazone 



Carbon disulphide 488.5 458 m/z 



Ethanol 465.5 mu 



The apo-3-norbixinal methyl ester was only obtained in one form. 

 References p. 2go-2g4. 



