Electrophile-Driven Regioselective Synthesis of Functionalized Quinolines
摘要:
Highly substituted 3-iodoquinolines bearing different alkyl and aryl moieties can be synthesized in moderate to excellent yields (up to 99%) by 6-endo-dig iodocyclization of 2-tosylaminophenylprop-1-yn-3-ols with molecular iodine (I-2) under mild conditions. The cyclization is highly regioselective and the resulting 3-iodoquinolines can be further functionalized by various coupling reactions.
Electrophile-Driven Regioselective Synthesis of Functionalized Quinolines
摘要:
Highly substituted 3-iodoquinolines bearing different alkyl and aryl moieties can be synthesized in moderate to excellent yields (up to 99%) by 6-endo-dig iodocyclization of 2-tosylaminophenylprop-1-yn-3-ols with molecular iodine (I-2) under mild conditions. The cyclization is highly regioselective and the resulting 3-iodoquinolines can be further functionalized by various coupling reactions.
Gold-Catalyzed Cycloisomerization Reactions of 2-Tosylaminophenylprop-1-yn-3-ols as a Versatile Approach for Indole Synthesis
作者:Prasath Kothandaraman、Weidong Rao、Shi Jia Foo、Philip Wai Hong Chan
DOI:10.1002/anie.201000341
日期:2010.6.21
A great combination: A putative indolyl‐substituted vinyl gold species generated in situ from AuCl/AgOTf catalyzed the title transformation. Under these reaction conditions, indenyl‐fused and 2,3‐disubstituted indole derivatives were produced in good to excellent yields of up to 94 % (see scheme).
Ag(I)-catalyzed synthesis of 2-azidomethyl benzofurans/indoles from linear and readily available hydroxyl/amino-phenyl propargyl alcohols is described via a highly regioselective C–O and C–N bond formation. Control experiments reveal that the reaction involves the sequential Ag(I)-catalyzed 5-exo-dig cyclization and a catalyst free γ-allylic azidation. The synthetic utility of this method has been