Aug 1, 2011 · Reactions on the alkynyl group of alkynyl-substituted 1,2-diazines have been incorporated starting from CHEC-II(1996) <1996CHEC-II(6)1>. Double nucleophilic additions (of the Michael type) with NaOMe and hydration in acid with the aid of the Lewis acid HgSO 4 were mentioned in the previous edition.

In this study, we synthesized a series of chiral Au(I) complexes using BINAP ligands and alkynyl ligands, incorporating amide structures and alkoxy groups into the alkynyl ligands to boost the self-assembly capability of the complexes (Scheme 1). We investigated the impact of varying the length or number of alkyl chains on solid-state emission ...

Mar 1, 2025 · In this study, we synthesized atomically precise Au 4 Cu 4-alkynyl clusters with bright photoluminescence (quantum yield: 49.2 %) for the sensitive and selective detection of ‧OH. The luminescence quenching mechanism of Au 4 Cu 4 in the presence of ‧OH can be attributed to the oxidation of alkynyl bonds and Cu(I) within the Au 4 Cu 4 ...

Oct 26, 2016 · Enantioenriched propargyl alcohols and amines constitute an important class of compounds owing to their unique reactivity and applicability in complex molecule synthesis (Scheme 1). 1 The alkynyl functionality derived from a direct addition of terminal alkyne onto carbonyls and imines provides a great synthetic platform for further derivation. 2 The addition of an acetylide gives an ...

Dec 1, 2022 · The alkynyl ligands induce 1D growth via the active surface growth mechanism, which was previously only applicable to the thiolated ligands. The binding mode of the alkynyl ligand on the Au surface was determined in a flat-lying manner via the donation of the π bond.

Oct 15, 2021 · These Ru(II)-alkynyl molecules can then be derivatized to allow for immobilization on gold surfaces as SAMs (self-assembled monolayers) for switch testing, and devices realized includes a novel Au-molecule-Au transport junction that exhibits controllable switching of conductivity between two distinct states [74, 75], as illustrated in Fig. 8.

Nov 15, 2020 · Alkynyl ligands with a triply bonded di-carbon (-C≡C-) fragment, coordinate gold to form organogold complexes. The structural characteristic of alkynyl gold(I) moiety is the two-coordinate, the linearity, and the rigid-rod topology [76]. Alkynyl ligands can be considered as strong σ- and π-donors.

Feb 18, 2025 · Described here is a review of recent advances on catalytic transformations of alkynyl sulfides since 2004. Four different types of reaction modes, including the transition‐metal‐catalyzed functionalization, electrophilic addition, radical‐initiated functionalization, and formal [2+n] cycloaddition, are presented, with an emphasis on analysis of reaction mechanisms and key facts for ...

A highly enantioselective catalytic addition of alkynyl zinc reagents to simple ketones was accomplished by the Chan group (Figure 15). 22 They initially examined the system using titanium tetraisopropoxide and alkynyl zinc reagents, which are known to be effective catalyst systems for the addition of alkynyl groups to aldehydes to the asymmetric alkynylation of …

Jan 24, 2025 · As such, the introduction of the alkynyl and phenyl-alkynyl into the triangular metallacyclic ligand is an effective strategy to improve the performance of third-order NLO materials. The γ tot values for the binuclear metal system with bisDBA ligands are approximately 2.1 and 4.1 times compared to mononuclear complex 1 , respectively.