Unusual tandem ring closing metathesis–Claisen rearrangement enroute to spiro annulation of O-allyl biscoumarins. Issue 17 (22nd April 2015)

• Record Type: Journal Article
• Authors: Yerrabelly, Jayaprakash Rao; Chakravarthula, Venu; Yerrabelly, Hemasri; Chitneni, Prasad Rao; Batchu, Venkateshwar Rao; Nanubolu, Jagadeesh Babu; Krishnan, Ravi Kumar
• Is Part Of: Tetrahedron letters. Volume 56:Issue 17(2015)
• Page Start: 2180
• Page End: 2182
• Publication Date: 2015-04-22
• Subjects: O-Allyl biscoumarins -- Ring closing metathesis (RCM) -- Claisen rearrangement -- Grubbs' catalyst -- Spiro coumarins; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2015.02.106
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Abstract: A simple and efficient synthesis of new spiro heterocyclic skeleton, 3′-vinyl-2′, 3′-dihydrospiro[chroman-3, 4′-oxepino[3, 2- c ]chromene]-2, 4, 6′(5′ H )-triones by an unusual one pot tandem RCM–Claisen rearrangement of O -allyl biscoumarins is described. A new example of a coumarin derivative containing seven membered cyclic ether.