A Facile Synthesis of 4-Arylbutyrolactones via the Palladium-catalyzed Arylation of 1,3-Dioxep-5-ene
摘要:
1,3-Dioxep-5-ene was arylated by using Heck reaction, and the arylated 1,3-dioxep-4-ene derivatives were easily converted into 4-arylbutyrolactones, intermediates for the synthesis of natural products and biological active compounds.
Generality and mechanism of homobenzylic-homoallylic hydrogenolysis of 5-aryl-4,5-dihydro-1,3-dioxepins
作者:Kiyohiro Samizu、Kunio Ogasawara
DOI:10.1016/0040-4039(94)80030-8
日期:1994.10
Birch reduction of several 5-aryl-4,5-dihydro-1,3-dioxepins gave rise to 3-arylbutanal in moderate to good yields by hydrogenolytic cleavage of the homobenzylic-homoallylic carbonoxygen bond when the benzylic-allylic carbon is tertiary. However, the reaction did not take place when the benzylic-allylic carbon is quaternary. Moreover, the reaction was found to proceed with complete racemization at
1,3-Dioxep-5-ene was arylated by using Heck reaction, and the arylated 1,3-dioxep-4-ene derivatives were easily converted into 4-arylbutyrolactones, intermediates for the synthesis of natural products and biological active compounds.