SYNTHESIS OF BENZOPYRAN DERIVATIVES .21. NOVEL AND SELECTIVE SYNTHESES OF NEW ANALOGS OF PRECOCENE-2 AND PRECOCENE-3 CONTAINING 5-METHYL-SUBSTITUENTS OR 8-METHYL-SUBSTITUENTS

Authors
TIMAR T SEBOK P ESZENYI T JASZBERENYI JC
Citation
T. Timar et al., SYNTHESIS OF BENZOPYRAN DERIVATIVES .21. NOVEL AND SELECTIVE SYNTHESES OF NEW ANALOGS OF PRECOCENE-2 AND PRECOCENE-3 CONTAINING 5-METHYL-SUBSTITUENTS OR 8-METHYL-SUBSTITUENTS, Heterocycles, 38(12), 1994, pp. 2719-2728
Citations number
20
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Heterocycles → ACNP
ISSN journal
03855414
Volume
38
Issue
12
Year of publication
1994
Pages
2719 - 2728
Database
ISI
SICI code
0385-5414(1994)38:12<2719:SOBD.N>2.0.ZU;2-M
Abstract
New analogues of precocene-2 and precocene-3 containing 5-methyl- or 8 -methyl-substituents have been synthesised in good yields utilising re gioselective O-alkylation of 6,7-dihydroxy-2,2,5-trimethyl-4-chromanon e and 6,7-dihydroxy-2,2,8-trimethyl-4-chromanone as the key step.