Results 11 to 20 of about 10,321 (224)
The Enantioselective Tsuji Allylation [PDF]
Journal of the American Chemical Society, 2004 The first catalytic enantioselective examples of the Tsuji allylation using enol carbonates and enol silanes are described. The products possess a quaternary stereogenic center and are useful building blocks for synthetic chemistry.
Douglas C Behenna +2 more
exaly +6 more sources
Allylation of aldehydes with various allylation agents
Results in ChemistryAllylation of aldehydes is one of the most important organic transformations that helps in the synthesis of compounds with special skeletons with unique medicinal properties. From 2001 to 2024, extensive research has been done in this field using different catalysts, and this organic technology is maturing.
Yavar Ahmadi
openaire +3 more sources
Nature Communications, 2021 Allylation of nucleophiles with less reactive electrophiles, such as carbonates, usually requires a transition-metal catalyst. Here, the authors show a transition-metal-free allylation strategy with allyl ether electrophiles to form homoallylic amine ...
Guogang Deng +8 more
doaj +1 more source
Synthesis of Novel Crown Ether-Squaramides and Their Application as Phase-Transfer Catalysts
Molecules, 2021 This work presents the synthesis of six new phase-transfer organocatalysts in which the squaramide unit is directly linked to the nitrogen atom of an aza-crown ether.
Zsuzsanna Fehér +9 more
doaj +1 more source
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
Application of Hosomi-Sakurai allylation reaction in total synthesis of biologically active natural products. [PDF]
Front ChemThe Hosomi–Sakurai allylation reaction has been widely applied in the total synthesis of biologically active natural products, especially in synthesising complex polycyclic compounds containing multi-stereogenic centres since its discovery in 1976.
Akwensi J +3 more
europepmc +2 more sources
Zinc-Catalyzed β-Allylation of Cyclopropanols via Enolized Homoenolate
, 2021 We report herein a zinc-catalyzed β-allylation of cyclopropanols with Morita–Baylis–Hillman (MBH) carbonates with retention of the cyclopropane ring.
Naohiko, Yoshikai, Yoshiya, Sekiguchi
core +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
Catalytic Asymmetric Defluorinative Allylation of Silyl Enol Ethers
, 2023 The stereocontrolled installation of alkyl fragments at the alpha position of ketones is a fundamental yet unresolved transformation in organic chemistry.
Albert, Moyano +3 more
core +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