Palladium catalyzed coupling of organostannanes with vinyl epoxides
作者:David R. Tueting、Antonio M. Echavarren、J.K. Stille
DOI:10.1016/0040-4020(89)80010-9
日期:1989.1
The coupling reaction of organotin reagents with vinyl epoxides, catalyzed by palladium, takes place at ambient temperatures, regioselectively, giving predominately the 1,4-addition product. Both aryl- and vinylstannanes undergo coupling in high yields, while acetylenic, allylic and benzylic tin reagents either give low yields or fail to couple. Although the double bond geometry in the vinylstannane
Aromatic compounds from Artemisia campestris subsp. Glutinosa
作者:J.-T. de Pascual、I.S. Bellido、M.S. González、M.R. Muriel、J.M. Hernandez
DOI:10.1016/s0031-9422(00)82678-3
日期:1981.1
Abstract From the weakly acid fraction of the hexane extract fromArtemisiacampestris subsp. glutinosa , five new aromatics have been isolated. They hav
2-Methyl-2-hydroxymethylchromenes from Artemisia campestris subsp. glutinosa
作者:J.T. de Pascual、M.S. Gonzalez、M.R. Muriel、I.S. Bellido
DOI:10.1016/0031-9422(83)80171-x
日期:1983.1
Abstract From the non volatile neutral part of a hexane extract fromArtemisiacampestris subsp. glutinosa , two new 2-methyl-2-hydroxymethyl chromenes h
Phenolic derivatives from Artemisia campestris subsp. Glutinosa
作者:J. De Pascual Teresa、M.S. González、M.R. Muriel、I.S. Bellido
DOI:10.1016/s0031-9422(00)83509-8
日期:1984.1
Abstract From the hexane extract of Artemisiacampestris subsp. glutinosa , sakuranetin, dihydroquercetin-7,3′-dimethyl ether and three acetophenone derivatives identified as 3-[4-acetoxyisopent-2( Z )-enyl]-4-hydroxyacetophenone, 3-[4-acetoxyisopent-2( E )-enyl]-4-hydroxyacetophenone and 3-(3-acetoxymethyl-2-hydroxybut-3-enyl)-4-hydroxyacetophenone, have been isolated.
摘要来自 Artemisia campestris subsp. 的己烷提取物。glutinosa , sakuranetin, dihydroquercetin-7,3'-二甲醚和三种苯乙酮衍生物被鉴定为 3-[4-acetoxyisopent-2( Z )-enyl]-4-hydroxyacetophenone, 3-[4-acetoxyisopent-2( E )-烯基]-4-羟基苯乙酮和3-(3-乙酰氧基甲基-2-羟基丁-3-烯基)-4-羟基苯乙酮已被分离出来。