TY - JOUR
T1 - Use of selective heteronuclear 13c1h noe measurements. a second note of warning on the assignment of structure to the products formed in the reactions between 4-hydroxy-2h-pyran-2-ones and carbonyl compounds.
AU - Cervello, J.
AU - Gil, M.
AU - de March, P.
AU - Marquet, J.
AU - Moreno-Mañas, M.
AU - Roca, J. L.
AU - Sanchez-Ferrando, F.
PY - 1987/1/1
Y1 - 1987/1/1
N2 - Further examples of the occurrence of intramolecular translactonization during condensation of 4-hydroxy-6-methyl-2H-pyran-2-one, 1, or 4-hydroxycoumarin, 4, with carbonyl compounds are desoribed. The structure of previously misassigned products 6a,b is proven by NMR techniques. Application of the HETNOE method to the distinction between structures 9 and 10 is demonstrated. © 1987.
AB - Further examples of the occurrence of intramolecular translactonization during condensation of 4-hydroxy-6-methyl-2H-pyran-2-one, 1, or 4-hydroxycoumarin, 4, with carbonyl compounds are desoribed. The structure of previously misassigned products 6a,b is proven by NMR techniques. Application of the HETNOE method to the distinction between structures 9 and 10 is demonstrated. © 1987.
UR - https://www.scopus.com/pages/publications/0001919493
U2 - 10.1016/S0040-4020(01)86824-1
DO - 10.1016/S0040-4020(01)86824-1
M3 - Article
SN - 0040-4020
VL - 43
SP - 2381
EP - 2387
JO - Tetrahedron
JF - Tetrahedron
IS - 10
ER -