9553. Torularhodin

Nomenclature

CAS number: 514-92-1
3′,4′-Didehydro-β,ψ-caroten-16′-oic acid.
C40H52O2; mol wt 564.84.
C 85.06%, H 9.28%, O 5.67%.

Description and references

Carotenoid pigment found in Torula rubra and Rhodotorula mucilaginosa yeasts. Isoln: Karrer, Rutschmann, Helv. Chim. Acta 26, 2109 (1943). Structure and synthesis: Isler et al., ibid. 42, 864 (1959).

Chemical structure

Properties

Fine dark purple needles from methanol + ether or toluene, mp 210-212° (vac, some decompn). Absorption max in CS2: 582, 541, 502 nm; in methanol: 529, 493, 460 nm. Freely sol in carbon disulfide, chloroform, pyridine; less sol in ether, benzene, hot ethanol; sparingly sol in methanol. Practically insol in petr ether.

Derivative

Methyl ester.
C41H54O2; mol wt 578.87.
C 85.07%, H 9.40%, O 5.53%.

Properties

Dark red needles from benzene + methanol, mp 172-173°.