We disclose here the first palladium-catalyzed Suzuki–Miyaura couplings of aryl ethers functionalized allenylphosphine oxides with arylboronicacids. This new methodology with α-allenyl ethers as starting materials provides a novel approach to generate phosphinoyl 1,3-butadienes and derivatives with medium to excellent yields. The reaction tolerates a variety of functional groups to afford ranges of
Regioselective Synthesis of Bioactive Polyheterocycles: Sequential [3, 3] Sigmatropic Rearrangements of 6-(4-Aryloxybut-2-yn-1-yloxy)[1]Benzopyran-2-Ones
作者:K. C. Majumdar、P. Chatterjee
DOI:10.1080/00397919808004939
日期:1998.10
7a-Methyl-13,13a-dihydro-7aH-furo[3,2-c : 5,4-f']bis-[1]benzopyran-3-ones (4a-d) are regioselectively synthesised in 65-75% yields by the sequential rearrangements of 6-(4-aryloxybut-2-yn-1-yloxy)[1]benzopyran-2-ones (3a-d) in refluxing N,N-diethylaniline (15 h). However, addition of toluene-4-sulphonic acid in the reaction mixture improved the yield (80-85%) and reduced the reaction time (10 h).
Unexpected formation of chroman-4-ones during the synthesis of 4-hydroxymethyl-2H-chromenes from 4-aryloxybut-2-yn-1-ols
作者:P Camps、M.A Lluch、M.J Climent、M.A Miranda
DOI:10.1016/s0040-4039(00)84443-3
日期:1986.1
CAMPS, P.;LLUCH, M. A.;CLIMENT, M. J.;MIRANDA, M. A., TETRAHEDRON LETT., 1986, 27, N 18, 2041-2042
作者:CAMPS, P.、LLUCH, M. A.、CLIMENT, M. J.、MIRANDA, M. A.
DOI:——
日期:——
Discovery of cyclopropyl chromane-derived pyridopyrazine-1,6-dione γ-secretase modulators with robust central efficacy
作者:Martin Pettersson、Douglas S. Johnson、Danica A. Rankic、Gregory W. Kauffman、Christopher W. am Ende、Todd W. Butler、Brian Boscoe、Edelweiss Evrard、Christopher J. Helal、John M. Humphrey、Antonia F. Stepan、Cory M. Stiff、Eddie Yang、Longfei Xie、Kelly R. Bales、Eva Hajos-Korcsok、Stephen Jenkinson、Betty Pettersen、Leslie R. Pustilnik、David S. Ramirez、Stefanus J. Steyn、Kathleen M. Wood、Patrick R. Verhoest
DOI:10.1039/c6md00406g
日期:——
γ-Secretase modulators for the treatment of Alzheimer's disease.