77513-51-0Relevant articles and documents
SYNTHESIS OF 4-PHENYLCOUMARINS FROM DALBERGIA VOLUBILIS AND EXOSTEMA CARIBAEUM
Bose, P.,Banerji, J.
, p. 2438 - 2439 (2007/10/02)
Two isomeric 4-phenyl coumarins, 3',7-dihydroxy-4',5-dimethoxy-4-phenylcoumarin (seshadrin) from Dalbergia volubilis and 3',5-dihydroxy-4',7-dimethoxy-4-phenylcoumarin from Exostema caribaeum have been synthesized.However, the spectral properties of the f
An Unambiguous Synthesis of Melannein
Ahluwalia, V. K.,Kapur, Kanchan,Manchanda, Saroj
, p. 186 - 188 (2007/10/02)
Melannein (6-hydroxy-7-methoxy-4-(3'-hydroxy-4'-methoxyphenyl)coumarin, I) and its O,O-diethyl ether (II) have been synthesised.The steps involved in the synthesis of I and II are the respective condensation of o-methoxyhydroquinone with ethyl m-benzyloxy-p-methoxybenzoylacetate (XI) and ethyl m-ethoxy-p-methoxybenzoylacetate (III) in absolute ethyl alcohol in the presence of dry hydrogen chloride gas.The isomeric O,O-diethyl ether of melannein, viz. 6-ethoxy-7-methoxy-4(4'-ethoxy-3'-methoxyphenyl)coumarin (VI) has also been prepared by the condensation of o-methoxyhydroquinone with ethyl p-ethoxy-m-methoxybenzoylacetate (VII).The esters (III), (VII) and (XI) have been prepared by the reaction of the appropriate acetophenone derivatives with diethyl carbonate in the presence of sodium hydride.
Synthesis of Substituted 6,7-Diphenyl-1,2,3,5,8,8a-hexahydroindolizines
Mangla, V. K.,Bhakuni, D. S.
, p. 931 - 937 (2007/10/02)
Substituted 6,7-diphenyl-1,2,3,5,8,8a-hexahydroindolizines (28a to 28e) have been synthesized by two methods.In first method, condensation of substituted 2-phenacylpyrrolidines (24b to 24d) with substituted phenylacetylchlorides (2) affords substituted 2-