114524-40-2Relevant articles and documents
Designing a catalytic synthesis of 4-methylcoumarin from ortho-iodophenyl 3-butenoate: Ring closure and isomerization control
Catellani, Marta,Chiusoli, Gian Paolo,Marzolini, Giovanna,Rossi, Emanuela
, p. 65 - 69 (2007/10/03)
The palladium-catalyzed ring closure of ortho-iodophenyl 3-butenoate to 4-methylcoumarin is in competition with the isomerization to the 2-butenoic ester; the latter reaction has been controlled by the appropriate use of ligands, solvents and neutralizing agents to the point that quantitative yields of the cyclic compound have been attained.
A REINVESTIGATION OF THE CLAISEN REARRANGEMENT OF METHYL γ-ARYOXYCROTONATES; A CONVENIENT SYNTHESIS OF 3-ETHYLIDENEBENZOFURAN-2(3H)-ONES
Sunitha, K.,Balasubramanian, K. K.
, p. 3269 - 3278 (2007/10/02)
The synthesis and Claisen rearrangement of methyl γ-aryloxyxcrotonates have been prepared and succesfully rearranged to a mixture of Z and E 3-ethylidenebenzofuran-2(3H)ones in refluxing ethylene glycol.