Coumarins are classi_ed by their 1H! 0! benzopyran! 1! one core structure" 0# and are
distinguished from other benzopyranones such as the isocoumarins" 1# 0 essentially for …

Coumarins are the largest group of 1-benzopyran derivatives found in plants. The initial
member of this group of compounds, coumarin (2 H-1-benzopyran-2-one), a fragrant …

This article reviews the most recent developments in the synthesis of isocoumarins and 3, 4-
dihydroisocoumarins (isochroman-1-ones), that is, compounds incorporating the …

This review of plant coumarins discovered between 1978 and 1989 has been compiled on
the premise that the reader has access to the 1978 review in this journal by the author (448) …

Hydroxycoumarin (= 4‐hydroxy‐2H‐1‐benzopyran‐2‐one) reacts with enals to give 1, 2‐or
1, 4‐addition products, depending on the nature and relative location of the substituents on …

Plants have a long history as therapeutic tools in the treatment of human diseases and have
been used as a source of medicines for ages. In search of new biologically active natural …

New, versatile coumarin syntheses have been developed which are based on the Claisen
rearrangement of allylic or propargylic aryl ethers in which the allylic or propargylic-carbon is …

S written comprehensive reviews pertaining to the chemistry of the naturally occurring
coumarins, the latest being that of Dean (3) in 1963. Mention should be made of the …

This could be explained by supposing that C4-methoxy group favours the isomerization of
transcinnamate (trans-2a) to cis-cinnamate (sis-2a), which cyclized irreversibly to coumarin …

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