
%0 Journal Article
%A Ahluwalia, VK 
%A Prakash, C 
%A Singh, RP 
%T A Convenient Synthesis of Psoralen Derivatives Oxygenated in the Pyrone Ring: 4-Methoxypsoralen and 3,4-Dimethoxypsoralen (Halkendin)
%J Australian Journal of Chemistry
%D 1979/06/01
%V 32
%N 6
%P 1361-1367
%K 
%R https://doi.org/10.1071/CH9791361
%U https://www.publish.csiro.au/paper/CH9791361 
%X A convenient synthesis of psoralen derivatives oxygenated in the pyrone ring, viz. 5-methoxy-7H-furo[3,2-g][l]benzopyran-7-one (4-methoxypsoralen) and 5,6-dimethoxy-7H-furo[3,2-g][l]benzopyran-7-one (3,4-dimethoxypsoralen or halkendin), has been achieved by blocking the 8-position of the coumarin ring with an iodo group, Claisen migration, and subsequent cyclization. 
