Diastereoselective Domino Heck-Suzuki Reaction: Synthesis of Substituted Methylenetetrahydrofurans
作者:Manfred Braun、Brigitte Richrath
DOI:10.1055/s-0028-1088217
日期:2009.4
In a palladium-catalyzed reaction of dienyl ethers with boronic acids, a diastereoselective cyclization occurs to give methylenetetrahydrofurans. They can be obtained as pure enantiomers and their conversion into dihydro-3(2H)-faranones and dioxanones is demonstrated.
Stereoselective synthesis of tetrahydrofurans and tetrahydropyrans by Ni(0) promoted tandem cyclization-carbonylation
作者:Antonio Delgado、Amadeu Llebaria、Francisco Camps、Josep M. Moretó
DOI:10.1016/s0040-4039(00)76727-x
日期:1994.6
Reaction of different vinyl bromides (1a-3a), beating phenyl substituted alkenyloxyalkyl groups, with Ni(CO)4 affords the corresponding substituted cyclic ethers 1b-3b in moderate to good yields and high diastereoselectivity. In the cyclization of 1a, the stereoselectivity of the process can be reversed by the use of additives, such as KOAc, TIOAc, Cs2CO3, and KOCOCF3.
Delgado Antonio, Llebaria Amadeu, Camps Francisco, Moreto Josep M., Tetrahedron Lett, 35 (1994) N 23, S 4011-4014
作者:Delgado Antonio, Llebaria Amadeu, Camps Francisco, Moreto Josep M.