116703-26-5Relevant articles and documents
Studies in Synthesis of Furocoumarins: Part XXVIII - Synthesis of Difuranocoumarins
Chandratre, Shubhangi P.,Trivedi, K. N.
, p. 1148 - 1150 (2007/10/02)
6,7-Diallyloxy-4-methylcoumarin (I) on Claisen migration gives 8-allyl-9-hydroxy-2,7-dimethyldihydrofuranobenzopyran-5(H)-one (IIa).The structure of IIa has been confirmed by spectral data (UV, PMR) and IIa is found to be identical (m.m.p., co-TLC) with a product synthesised unambiguously starting from 6,7-diacetoxy-4-methylcoumarin.Product IIa on cyclisation with H2SO4 gives a tetrahydrodifurano derivative (III) which on dehydrogenation over 10percent Pd/C furnishes the difurano derivative (IV).Structures of all these compounds have been confirmed by their PMR spectra.