Results 21 to 30 of about 12,893 (216)
Rapid Decarboxylative Allylation of Nitroalkanes [PDF]
, 2010 Allyl nitroacetates undergo decarboxylative allylation to provide tertiary nitroalkanes in high yield. Moreover, the transformations are complete within several minutes under ambient conditions. High yields result because O-allylation of the intermediate
Tunge, Jon A. +5 more
core +2 more sources
Molecules, 2023 Allylation of N-unsubstituted isatin N,N′-cyclic azomethine imines with Morita-Baylis-Hillman carbonates in the presence of 1–10 mol% DABCO in DCM at room temperature, rapidly gave N-allylated and N, β-diallylated isatin N,N′-cyclic azomethine imine 1,3 ...
Qiumi Wang +10 more
doaj +1 more source
Copper(I)-catalyzed asymmetric 1,6-conjugate allylation
Nature Communications, 2020 Catalytic asymmetric conjugate allylation of unsaturated carbonyl compounds is usually difficult to achieve due to competing 1,2-addition. Here, the authors report a copper(I)-catalyzed asymmetric 1,6-conjugate allylation of 2,2-dimethyl-6-alkenyl-4H-1,3-
Chang-Yun Shi +3 more
doaj +1 more source
Intramolecular Barbier reaction in water: cyclopentane and cyclohexane ring closure [PDF]
Journal of the Serbian Chemical Society, 2002 Zinc or indium promoted intramolecular Barbier reactions of aldehydes containing a suitably positioned allylic or propargylic halide unit afford unsaturated cyclic alcohols in moderate yields.
RADOMIR N. SAICIC +2 more
doaj +3 more sources
Molecules, 2016 Secondary and tertiary alcohols synthesized via allylation of aldehydes and ketones are important compounds in bioactive natural products and industry, including pharmaceuticals.
Viviane P. de Souza +6 more
doaj +1 more source
Generation and Reactions of ε-Carbonyl Cations via Group 13 Catalysis
Molecules, 2022 The generation of ε-carbonyl cations and their reactions with nucleophiles is accomplished readily without transition metal cation stabilization, using the ε-bromide dienoate or dienone starting materials and GaCl3 or InCl3 catalysis.
Page M. Penner, James R. Green
doaj +1 more source
Angewandte Chemie, EarlyView.Catalytic strain‐release ring opening and functionalizations of 1‐azabicyclo[1.1.0]butanes (ABBs) represent a promising strategy for accessing diverse azetidine products. These transformations proceed via polar pathways, radical pathways, and hybrid mechanisms that combine both.
James Shao‐Jiun Yang +1 more
wiley +2 more sources
Deacylative Allylation: Allylic Alkylation via Retro-Claisen Activation [PDF]
, 2016 A new method for allylic alkylation of a variety of relatively nonstabilized carbon nucleophiles is described herein. In this process of “deacylative allylation”, the coupling partners, an allylic alcohol and a ketone pronucleophile, undergo in situ ...
Alexander J. Grenning (2167951) +1 more
core +2 more sources
Rapid Decarboxylative Allylation of Nitroalkanes
, 2016 Allyl nitroacetates undergo decarboxylative allylation to provide tertiary nitroalkanes in high yield. Moreover, the transformations are complete within several minutes under ambient conditions. High yields result because O-allylation of the intermediate
Alexander J. Grenning (2167951) +1 more
core +2 more sources
Difluoromethylenation of Alkynes: Streamlined Access to Allyl Difluorides
Angewandte Chemie, EarlyView.Stabilizing primary oxocarbenium in HF/pyridine unlocks a direct alkyne difluoromethylenation – an efficient route to synthetically‐relevant allyl difluorides in a single step. ABSTRACT A direct difluoromethylenation of alkynes has been developed using HF/pyridine as a dual acidic and fluorinating medium. The reaction proceeds via in situ generation of
Fabien Naullet +4 more
wiley +2 more sources