Synthesis of Indolines via a Domino Cu-Catalyzed Amidation/Cyclization Reaction
作者:Ana Minatti、Stephen L. Buchwald
DOI:10.1021/ol8008792
日期:2008.7.3
A highly efficient one-pot procedure for the synthesis of indolines and their homologues based on a domino Cu-catalyzed amidation/nucleophilic substitution reaction has been developed. Substituted 2-iodophenethyl mesylates and related compounds afforded the corresponding products in excellent yields. No erosion of optical purity was observed when transforming enantiomerically pure mesylates under the
Synthesis of Multisubstituted Allenes via Nickel-Catalyzed Cross-Electrophile Coupling
作者:Youxiang Jin、Hao Wen、Feiyan Yang、Decai Ding、Chuan Wang
DOI:10.1021/acscatal.1c04143
日期:2021.11.5
context, we report the successful application of a cross-electrophile strategy in the synthesis of multisubstituted allenes. Under the catalysis of nickel, reductive cross-couplingbetween propargyl carbonates and organoiodides provides an entry to prepare tri- or tetrasubstituted allenes without employing any pregenerated organometallics. Furthermore, propargyl carbonates also prove to be suitable allenylating
Starting from diverse alkene-tethered aryl iodides and O-benzoyl-hydroxylamines, the enantioselective reductive cross-electrophilic 1,2-carboamination of unactivatedalkenes was achieved using a chiral pyrox/nickel complex as the catalyst. This mild, modular, and practical protocol provides rapid access to a variety of β-chiral amines with an enantioenriched aryl-substituted quaternary carbon center
The preparation of polyfunctional organometallics is important in organic synthesis as these reagents are very popular nucleophiles. The preparation of functionalized aluminium reagents by directinsertion of aluminium powder is in general not possible. Such a reaction would be of special importance owing to the low price of aluminium compared with magnesium (it is half the price), the low toxicity
The reduction of organic halides with tributyltin hydride in the presence of a catalytic amount of triethylborane has been studied. (1) Alkyliodides and alkyl bromides reacted easily with tin hydride at −78°C to give the corresponding hydrocarbons, while alkyl chlorides were sluggish to react and recovered unchanged. (2) The reduction of alkenyl halides such as 1-deuterio-1-iodo-1-dodecene and 1-