6344-67-8Relevant articles and documents
Method for reducing carbonyl reduction to methylene under illumination
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Paragraph 0033-0043, (2021/09/29)
The invention belongs to the technical field of organic chemical synthesis. The method comprises the following steps: (1) mixing the carbonyl compound and the amine compound in a solvent, reacting 3 - 6 under the illumination of 380 - 456 nm, the reaction system is low in toxicity, high in atom utilization rate 12 - 24h. and production efficiency, safe and controllable in reaction process and capable of simplifying the operation in the preparation and production process. At the same time, the residue toxicity of the reaction is minimized, the pollution caused by the production process to the environment is reduced, and the steps and operations of removing residues after the reaction are simplified. In addition, the reactant feedstock is readily available. The reactant does not need additional modification before the reaction, can be directly used for preparing production, simplifies the operation steps, and shortens the reaction route. The production cost is obviously reduced.
Formation of benzo-fused carbocycles by formal radical cyclization onto an aromatic ring
Clive, Derrick L. J.,Sunasee, Rajesh
, p. 2677 - 2680 (2008/02/09)
Equation Presented An indirect method for effecting radical carbocyclization onto aromatic rings is described. Cross-conjugated dienones such as 13, readily prepared by Birch reduction of aromatic fert-butyl esters, in situ alkylation, and oxidation (10 → 11 → 12 → 13), undergo radical cyclization; the products (14) are aromatized by silylation, Saegusa oxidation, and treatment with BiCl3·H2O. A noteworthy feature of this route is that it provides opportunities to attach an additional substituent to the original aromatic ring.
Studies under continuous irradiation of photochromic spiro [fluorenopyranthioxanthenes]
Salvador, Maria A.,Coelho, Paulo J.,Burrows, Hugh D.,Oliveira, M. Manuel,Carvalho, Luis M.
, p. 1400 - 1410 (2007/10/03)
New indeno-fused spiro[benzopyran-thioxanthenes] were synthesized (see 3a-d in Scheme3) and their photochromic properties evaluated under continuous irradiation (Table 1). When submitted to irradiation for several minutes with a Xe lamp, the system behaved as one constituted by two open colored forms with different thermal bleaching rates and different susceptibilities to degradation. An increase in irradiation time led to significant degradation and to the apparent predominance of the open colored form with the faster bleaching rate.
