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Larch tannin-based rigid phenolic foam with high compressive strength, low friability, and low thermal conductivity reinforced by cork powder
Abstract Phenolic foam (PF) has recently been spotlighted because of their excellent flame resistance, low smoke emission, and low production costs. However, PF is mainly prepared from… Expand
High‐performance imitation precious wood from low‐cost poplar wood via high‐rate permeability of phenolic resins
Precious wood has high performances, but has limited availability, increasingly rising cost, and requires a long growth cycle. Imitation precious wood was prepared from low-cost and fast-growing… Expand
All-Carbon Quaternary Centers via Catalytic Asymmetric Hydrovinylation. New Approaches to the Exocyclic Side Chain Stereochemistry Problem
1-Alkylstyrenes undergo efficient hydrovinylation (coupling with ethylene) in the presence of 1 mol % of a Ni catalyst prepared from [(allyl)NiBr]2, Na+BAr4- (Ar = 3,5-bistrifluoromethylphenyl), and… Expand
Hydrovinylation of 1,3-dienes: a new protocol, an asymmetric variation, and a potential solution to the exocyclic side chain stereochemistry problem.
- Aibin Zhang, T. V. RajanBabu
- Chemistry, Medicine
- Journal of the American Chemical Society
- 11 January 2006
Cyclic and acyclic 1,3-dienes undergo efficient (substrate/catalyst = 72) heterodimerization with ethylene in the presence of a Ni catalyst prepared from [o-(PhCH2O)]C6H4PPh2, [(allyl)2NiBr]2, and… Expand
Tuning of regioselectivity in the coupling reaction involving allenic/propargylic palladium species.
Two different types of coupling patterns for the Pd(0)-catalyzed coupling reaction of allenic/propargylic zinc reagents with organic halides or propargylic carbonates (acetate) with the corresponding… Expand
Chiral benzyl centers through asymmetric catalysis. a three-step synthesis of (R)-(-)-alpha-curcumene via asymmetric hydrovinylation.
[reaction: see text] A three-step, two-pot procedure involving asymmetric hydrovinylation followed by Suzuki-Miyaura reaction represents by far the shortest synthesis of this popular bisabolane.… Expand
Fine-tuning monophosphine ligands for enhanced enantioselectivity. Influence of chiral hemilabile pendant groups.
[reaction: see text] C(2)-Symmetric P-(2-X-aryl)-2,5-dialkylphospholanes (X = dioxolan-2-yl or dioxan-2-yl), designed on the basis of a working model for asymmetric induction, are effective ligands… Expand
Triarylphosphine Ligands with Hemilabile Alkoxy Groups. Ligands for Nickel(II)-Catalyzed Olefin Dimerization Reactions. Hydrovinylation of Vi-nylarenes, 1,3-Dienes, and Cycloisomerization of…
- Souvagya Biswas, Aibin Zhang, Balaram Raya, T. V. RajanBabu
- Chemistry, Medicine
- Advanced synthesis & catalysis
- 7 July 2014
Substitution of one of the phenyl groups of triphenylphosphine with a 2-benzyloxy-, 2-benzyloxymethyl- or 2-benzyloxyethyl-phenyl moiety results in a set of simple ligands, which exhibit strikingly… Expand
Enediynes from aza-enediynes: C,N-dialkynyl imines undergo both aza-Bergman rearrangement and conversion to enediynes and fumaronitriles.
[reaction; see text] Aza-enediynes (C,N-dialkynyl imines) undergo thermal aza-Bergman rearrangement to beta-alkynyl acrylonitriles through 2,5-didehydropyridine (2,5-ddp) intermediates. Certain… Expand
Unusual regioselectivity of Pd(0)-catalyzed coupling reaction of electron-deficient alkenyl halides with allenic/propargylic zinc reagents. Highly selective synthesis of 6-phenylhex-5-yn-2(or…
The Pd(0)-catalyzed coupling reaction of electron-deficient alkenyl halides with the organozinc formed by the subsequent treatment of 1-phenylalk-1-yne with n-BuLi and ZnBr2 with or without a… Expand