期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 126, 期 50, 页码 16433-16439出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja0450096
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A family of proazaphosphatrane ligands [P(RNCH2CH2)(2)N(R'NCH2CH2): R = wR' = i-Bu, 1; R = Bz, R' = i-Bu, 3; R = R' = Bz, 4] for palladium-catalyzed Stille reactions of aryl chlorides is described. Catalysts derived from ligands 1 and 4 efficiently catalyze the coupling of electronically diverse aryl chlorides with an array of organotin reagents. The catalyst system based on the ligand 3 is active for the synthesis of sterically hindered biaryls (di-, tri-, and tetra-ortho substituted). The use of ligand 4 allows room-temperature coupling of aryl bromides and it also permits aryl triflates and vinyl chlorides to participate in Stille coupling.
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