- Preparation of 2,2-dimethylchroman-4-ones from 5-alkyl-substituted resorcinols: Microwave-assisted synthesis and theoretical calculations
-
The influence of different 5-alkyl-substituted resorcinols on the formation of 2,2-dimethylchroman- 4-ones is examined experimentally and theoretically. Structures are fully assigned by means of experimental and theoretical 13C and 1H NMR chemical shifts.
- Morales, Paula,Azofra, Luis Miguel,Cumella, Jose,Hernandez-Folgado, Laura,Roldan, Maria,Alkorta, Ibon,Jagerovic, Nadine
-
p. 319 - 332
(2014/03/21)
-
- FUSED BICYCLIC COMPOUND
-
The present invention provides a novel fused bicyclic compound having an affinity to a receptor of mineral corticoid (MR), shown by the formula [I]: wherein the ring A is a benzene ring having a substituent R1, fused to an adjacent 6-membered h
- -
-
Page/Page column 86
(2010/05/13)
-
- Synthesis of 1-aryl-3-methyl-but-2-en-1-ones intermediates for the synthesis of chromanone derivatives
-
A convenient preparation of hitherto unknown compounds 3a, 4a, 3c, 4b and 4c by Friedel-Crafts reaction of active phenol derivatives and 3,3-dimethylacrylol chloride using anhydrous aluminium iodide as the condensing agent is described.
- Vijayalakshmi,Subramanian,Rajendra
-
p. 661 - 663
(2007/10/02)
-
- α, β-Unsaturated N-Acylureas as Useful Intermediates for the Synthesis of Indanones, Chromanones and Coumarins
-
α,β-Unsaturated N-acylureas, viz-N-formamido-2-butenamide (I), N-formamido-3-methyl-2-butenamide (II) and N-formamido-3-phenyl-2-propenamide (III) react with aryl alkyl ethers in the presence of PPA to afford the corresponding crotonophenones and chalcones (IV) at lower temperature and 1-indanones (V) at a higher temperature.Reactions of I and II with phenols in the presence of PPA afford the 4-chromanones (VI), while III gives 3,4-dihydro-4-phenylcoumarins (VII) in excellent yields.
- Ramana, M. M. V.,Kudav, N. A.
-
p. 339 - 341
(2007/10/02)
-
- SYNTHESIS OF ANALOGUES OF NATURAL PRECOCENES CONTAINING A 5-METHYL SUBSTITUENT
-
The synthesis of benzopyran compounds (VII a-q), analogues of precocene I (I) substituted on C-5 in the aromatic ring with a methyl group, is described.
- Timar, Tibor,Jaszberenyi, J. Csaba,Hosztafi, Sandor
-
p. 457 - 464
(2007/10/02)
-