Aromatic ring synthesis by 1,3-Michael-Claisen annulation: Formation of dihydrobenzofurans and tetrahydrochromans from α-methylene γ-butyrolactone and δ-valerolactone
摘要:
Substituted dihydrobenzofurans and tetrahydrochromans have been prepared from respectively alpha-methylene-gamma-butyrolactone: and delta-valerolactone via a 1,3-Michael-Claisen reaction from two 3-carbon units, 1,1-bis-(methylthio)-2-propanone or butanone, and an alpha-methylene lactone.
Aromatic ring synthesis by 1,3-michael-claisen annulation: Application to a trolox analogue and to precocene II
作者:Guy Soiladié、Dominique Boeffel、Jean Maignan
DOI:10.1016/0040-4020(95)01044-0
日期:1996.2
4-dihydro-2-ethoxycarbonyl-6-methoxy-7-hydroxy- benzopyran and Precocene II, were prepared from substituted α-methylene-δ- valerolactone and 1,1-bis-(methylthio)-2-propanone or butanone, via a 1,3-Michael- Claisen annulation.
Boehme; Wolff, Chemische Berichte, 1947, vol. 80, p. 195,196
作者:Boehme、Wolff
DOI:——
日期:——
Synthesis of Trimethyl α-Keto Trithioorthoesters and Dimethyl α-Keto Dithioacetals by Reaction of Acyl Chlorides, Anhydrides, Thiol Esters, and <i>N</i>,<i>N</i>-Dimethylamides with [Tris(methylthio)methyl]lithium