Thelomma mammosum

Deriv Methyl 3-chlorodivaricatate, prisms (MeOH), mp 108-109 °C, from 3-chlorodivari-catic acid with CHjNj at 0°C in 1 min StL Thelomma mammosum (Hepp in Hartung) Massal. 

Chlorinated orcinol p zra-depsides occur very rarely in lichens and until recently timidulin (207) was the sole known representative. Two further chlorodepsides have now been isolated, 3,5-dichloro-2 -0-methylanziaic acid (208) from Lecanora sulphurella 183) and 3-chlorodivaricatic acid (209) from Thelomma mammosum 197). 

Chloro- divaricatic acid OH Cl OMe H Pr H OH CO2H Pr H Thelomma mammosum Column chromatography Spectral data ( c-n.m.r.) comparison with 5-chloro isomer 197)... 

Chlorodivaricatic acid 130 158-159 Thelomma mammosum Ramalina seyreana 95 (25 )... 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

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