Title of article :
Palladium catalysed reaction of allene with phenols. Phenoxymethyl-1,3-dienes and their further reactions
Author/Authors :
Ronald Grigg، نويسنده , , Ngampong Kongkathip، نويسنده , , Boonsong Kongkathip، نويسنده , , Suwaporn Luangkamin، نويسنده , , H.Ali Dondas، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2001
Abstract :
A 3-step 100% atom economic sequence is reported whereby a variety of phenols react with 2 mol equiv. of allene to give phenoxymethyl-1,3-dienyl ethers. Subsequent thermal Claisen rearrangement to C-1,3-dienes and acid catalysed ring closure furnishes 3:1–6.5:1 mixtures of exo-methylene chromans and dihydrobenzofurans with the former predominating.
Keywords :
chromans , dihydrobenzofurans , atom economy , Claisen rearrangement , Cyclisation
Journal title :
Tetrahedron
Journal title :
Tetrahedron
