已经发现,在5mol%的碘化亚铜(I)存在下,格氏试剂可将磺酰基活化的sp 3碳-氮键裂解。重要的是,广泛的磺酰基活化的苄基,烯丙基和炔丙基胺与格利雅试剂进行平滑的交叉偶联反应,从而提供结构多样的偶联产物,收率高至优异,并具有较高的化学,区域和立体选择性。此外,已经证明S N 2机理参与交叉偶联反应,该交叉偶联反应允许由旋光的α-支化胺衍生物不对称地合成手性烃。
Regioselective Intermolecular Allylic C−H Amination of Disubstituted Olefins via Rhodium/π-Allyl Intermediates
作者:Jacob S. Burman、Simon B. Blakey
DOI:10.1002/anie.201707021
日期:2017.10.23
A method for catalytic intermolecularallylic C−H amination of trans‐disubstituted olefins is reported. The reaction is efficient for a range of common nitrogen nucleophiles bearing one electron‐withdrawing group, and proceeds under mild reaction conditions. Good levels of regioselectivity are observed for a wide range of electronically diverse trans‐β‐alkyl styrene substrates.
The ruthenium-catalyzed highly linear selective allylic amination of monosubstituted allylic acetates with secondary amines was developed. The regioselectivity was controlled by the RU3(CO)(12)/2-DPPBA catalyst, and a linear-type aminated product was obtained as a single regioisomer. (C) 2008 Elsevier Ltd. All rights reserved.
Kunakova, R. V.; Sirazova, M. M.; Dzhemilev, U. M., Journal of Organic Chemistry USSR (English Translation), 1987, vol. 23, # 4, p. 746 - 752
作者:Kunakova, R. V.、Sirazova, M. M.、Dzhemilev, U. M.