Formal<i>anti</i>-Carbopalladation Reactions of Non-Activated Alkynes: Requirements, Mechanistic Insights, and Applications
作者:Martin Pawliczek、Tobias F. Schneider、Christian Maaß、Dietmar Stalke、Daniel B. Werz
DOI:10.1002/anie.201411210
日期:2015.3.23
Formal anti‐carbopalladation reactions of CC triple bonds are uncommon, but highly useful transformations. Alkynes can be designed to give anti‐carbopalladation products. Prerequisite is the exclusion of other reaction pathways to provoke the cis–trans isomerization of the syn‐carbopalladation intermediate. Detailed mechanistic studies of this crucial step by experimental and computational means were
Chemo-, regio-, and stereoselective hydroboration of conjugated enyne alcohol/amine: facile synthesis of Z , Z -/ Z , E -1,3-dien-1/2-ylboronic ester bearing hydroxyl/amino group
Hydroboration of conjugated enyne alcohol/amine is studied by using copper salts and bis(pinacolato)diboron as pre-catalysts and boron source respectively. It is suggested that the chemo-selectivity is derived from a combined electronic influence of the heteroatoms on the substrate and the ligand on the transition metal. The regioselectivity is probably dominated mainly by electronic effect of the
Asymmetric Synthesis of Allenyl Oxindoles and Spirooxindoles by a Catalytic Enantioselective Saucy-Marbet Claisen Rearrangement
作者:Trung Cao、Joshua Deitch、Elizabeth C. Linton、Marisa C. Kozlowski
DOI:10.1002/anie.201107417
日期:2012.3.5
Saucy selection: The first catalytic, enantioselectiveSaucy–MarbetClaisenrearrangement has been achieved. Palladium(II) (R)‐binap or tBuphox catalysts L*Pd(SbF6)2 were employed to generate allenyloxindoles or spirolactones bearing a quaternary center with up to 98 % ee.
Asymmetric Synthesis of 3-Allyloxindoles and 3-Allenyloxindoles by Scandium(III)-Catalyzed Claisen Rearrangement Reactions
作者:Zeng-Wei Lai、Chuan Liu、Hongbin Sun、Shu-Li You
DOI:10.1002/cjoc.201700486
日期:2017.10
Scandium‐catalyzed asymmetric Claisenrearrangementreactions of 2‐allyloxyindoles and 2‐propargyloxyindoles provide a novel approach to diverse 3‐allyloxindoles and 3‐allenyloxindoles in excellent yields (up to 99%) and enantioselectivity (up to 99% ee) under mild reaction conditions. The scandium catalyst was derived from Sc(OTf)3 and Pybox ligand.
Compounds and pharmaceutical compositions that modulate kinase activity, including PI3 kinase activity, and compounds, pharmaceutical compositions, and methods of treatment of diseases and conditions associated with kinase activity, including PI3 kinase activity, are described herein.