Etudes infrarouge et NMR d'aryl-2 dihydro-1,2 (4H) thienobenzopyrannones-4

Article abstract of DOI:10.1016/0584-8539(82)80101-3

The spectroscopic properties (i.r., NMR) of 2-aryl-1,2-dihydro (4H) thieno<2,3-c>benzopyrane-4-ones have been studied.Chemical shifts and coupling constants of dihydrothienylic protons are affected by substitution on the aryl ring and on homocycle 2',8 and 9 positions to give a conformational approach of these new compounds.The crystal structure of 2-phenyl dihydrothienocoumarine agrees the results of the spectroscopic study.