93338-99-9Relevant articles and documents
FUNCTIONALIZATION OF 4-HYDROXY-6-METHYL-2-PYRONE AT C-5 THROUGH SIGMATROPIC REARRANGEMENTS OF ALLYLIC SULFONIUM YLIDES
March, P. de,Moreno-Manas, M.,Ripoll, I.
, p. 521 - 532 (2007/10/02)
Functionalization at C-5 of the triacetic acid lactone methyl ester, 7, has been achieved by a transfer from the C-6 position.Thus, treatment of sulfides 12 with an excess of ethyl diazoacetate provides the pyrones 15 through sigmatropic rearrangements.