AgSCF3/Na2S2O8-Promoted Trifluoromethylthiolation/Cyclization of o-Propargyl Arylazides/o-Alkynyl Benzylazides: Synthesis of SCF3-Substituted Quinolines and Isoquinolines
摘要:
A AgSCF3/Na2S2O8-promoted trifluoromethylthiolation/cascade cyclization of o-propargyl arylazides (or o-alkynyl benzylazides) triggered by a carbon carbon triple bond is reported. This strategy provides the synthesis of " valuable SCF3-substituted quinoline and isoquinoline systems via the construction of one C(sp(2)) SCF3 bond and one C-N bond within one process.
A novel and efficient strategy for one-step synthesis of allylated quinolines and isoquinolines via palladium-catalyzed cyclization-allylation of azides and allyl methyl carbonate is developed for the first time. The results indicated that the regioselective synthesis of allyl- and diallyl-substituted quinolines/isoquinolines depends on different substituted groups at R(1) and R(4) positions, such
Efficient approach to allylated quinolines via palladium-catalyzed cyclization–allylation of 1-azido-2-(2-propynyl) benzenes with allyl methyl carbonate
The palladium-catalyzed cyclization-allylation reaction of ortho-azido propynylbenzenes 1 and ally' methyl carbonate 2d gives the corresponding allylated quinolines in moderate to good yields. The reaction of 1-azido-2-(2-propynyl)benzene la proceeds smoothly with 10 mol % Pd(PPh3)(4) and 5 equiv K3PO4 or NaOAc in DMF at 100 degrees C to afford 3,4-diallylquinoline 3a in 69% yield in the case of R-2 = H and 3-allylquinoline 4 in 67% yield in the case of R-2 not equal H. (C) 2014 Elsevier Ltd. All rights reserved.