RuH 2 (PPh 3 ) 4 -catalyzed reaction of nitriles with terminal alkynes proceeds highly efficiently under neutral conditions to give the corresponding Michael adducts. Furthermore, 1,3-dicarbonyl compounds react with terminal alkynes at the α-position to afford the exo-methylene compounds with high regioselectivity under neutral conditions. The regioselectivity depends upon the change of substrates
RuH 2 (PPh 3 ) 4 催化的腈与末端炔烃的反应在中性条件下高效进行,得到相应的迈克尔加合物。此外,1,3-二羰基化合物在α-位与末端炔烃反应,在中性条件下提供具有高区域选择性的外亚甲基化合物。区域选择性取决于底物的变化。提出了精确的机制。
Palladium catalysed direct allylation of pronucleophiles with allylstannanes
作者:Yoshinori Yamamoto、Naoya Fujiwara
DOI:10.1039/c39950002013
日期:——
The reaction of pronucleophiles 1 with allyltributylstannanes in the presence of catalytic amounts of Pd2(dba)3·CHCl3(4 mol%) and 1,2-bis(diphenylphosphino)ethane (dppe)(10 mol%) at room temperature gives the corresponding allylation products in good to high yields.
Enantioselective Synthesis of Tertiary Allylic Fluorides by Iridium‐Catalyzed Allylic Fluoroalkylation
作者:Trevor W. Butcher、John F. Hartwig
DOI:10.1002/anie.201807474
日期:2018.10
Few allylic electrophiles containing two different substituents at a single allyl terminus and none in which one of the two substituents is a heteroatom, have been shown previously to react with iridium catalysts to form substitution products. We report that iridium‐catalysts are uniquely suited to form tertiary allylicfluorides enantioselectively by the addition of a diverse range of carbon‐centered
Carbopalladation of Nitriles: Synthesis of Benzocyclic Ketones and Cyclopentenones via Pd-Catalyzed Cyclization of ω-(2-Iodoaryl)alkanenitriles and Related Compounds
作者:Alexandre A. Pletnev、Richard C. Larock
DOI:10.1021/jo0262006
日期:2002.12.1
An efficient procedure for the synthesis of 2,2-disubstituted benzocyclic ketones by intramolecular carbopalladation of nitriles has been developed. The cyclization of substituted 3-(2-iodoaryl)propanenitriles affords indanones in high yields. The reaction is compatible with a wide variety of functional groups. This methodology has been extended to the synthesis of tetralones and cyclopentenones.