108807-15-4Relevant articles and documents
DBU-mediated regioselective intramolecular cyclization/dehydration of ortho diketo phenoxyethers: A synthesis of 2,3-substituted γ-benzopyranones
Bensulong, Sofia,Boonsombat, Jutatip,Ruchirawat, Somsak
, p. 9335 - 9348 (2013/10/01)
The regioselective cyclization/dehydration sequence of ortho diketo phenoxyethers induced by DBU has been explored. The results demonstrated a high degree of selectivity with preference for 6-exo-trig cyclization leading to the formation of γ-benzopyranone derivatives in good yield.
Use of Phosphorus Pentoxide. Preparation of Half-esters through Selective Esterification
Banerjee, Amalendu,Adak, Mohini Mohan,Das, Sankar,Banerjee, Santa,Sengupta, Saumitra
, p. 34 - 37 (2007/10/02)
Methyl 2-,3-,4-carboxyphenylacetate and methyl 2-,3-,4-carboxyphenoxyacetate have been prepared through selective esterification of the aliphatic carboxylic acid function of the corresponding dicarboxylic acids using a mixture of phosphorus pentoxide (1 part), anhydrous copper sulphate (5 parts) and anhydrous sodium sulphate (5 parts).All the isomeric half-esters have been prepared through partial hydrolysis of the corresponding dimethylesters.
