the mixed solution is crystallized for 10-100 hours under the condition that the temperature is 100-220 DEG C; after being naturally cooled down and taken out, the reaction product is taken out; the microporous and mesoporous organo-metallic compound is prepared through suction-filtering, washing...
Direct one-pot oxidation, which avoids the well-known racemization of the monoacylated product, directly leads to -acetoxy ketones with enantiomeric ratios of up to 97:3 and 97 % yield.Christian E. MüllerInstitute of Organic ChemistryDaniela Zell...
product was separated by extraction into aqueous acid. This enabled subsequent recycling of the alkaloid which, in this case, was reported to reduce the overall cost of the process. Thecis-product92was then epimerized to the requiredtrans-isomer93using potassiumtert-amylate. Thetrans-ester93was ...
solvent, temperature, and the presence of oxygen, as well as on the initial reactant concentrations. Dimethylformamide was convincingly shown to be the most appropriate solvent. The primary condensation product forms a complex with DMF (Scheme4), which prevents the formation of ...
A one-pot protocol was developed for such reactions by a tandem aldol-thia-Michael process. The stereochemistry of the products was confirmed by X-ray crystallographic studies and in all cases formation of amesoproduct was observed.关键词: diastereoselective process thia-Michael reaction α,α′-...
A 5,15,25-trialkynyl [28]hexaphyrin(1.1.1.1.1.1) is the main product of the boron trifluoride-catalysed condensation of meso-anthryl dipyrromethane and tri... Alexander,Krivokapic,Harry,... - 《Organic & Biomolecular Chemistry》 被引量: 12发表: 2003年 ...
Product License Enterprise Authentication ISO GMP FDA HALAL Display Default Sort New supplier First Reset Confirm Products Categories Pharmaceutical (58) Others (13) Organic Chemicals (5) Reagent (1) Materials (1) Basic Information CAS No.: 109781-47-7 Name: PT(II) MESO-TETRA(PENTAFLUOROP...
Figure 14.SEM micrographs of mesocrystalline microcube (a) carbonate precursor and (b) LMNO final product; mesocrystalline microsphere (c) carbonate precursor and (d) LMNO final product. (e) Comparative cycle performance of LMNO mesocrystalline microcubes, microspheres, and commercial nanoparticles. ...
ImageUpdate timeProductPriceMin. OrderPuritySupply AbilityManufacturer 2024-11-19Tetrakis (4-carboxyphenyl) porphyrin 14609-54-2 US $41.00-54.00 / mg10gTargetMol Chemicals Inc. 2023-11-29TCPP 14609-54-2 US $5000.00 / KG/Tin1KG97100KGChongqing Chemdad Co.,Ltd ...
Linear porphyrin arrays synthesized via reactions including CF3 CHO+pyrrole to afford trifluoro dipyrromethane are disclosed in the abstract of a poster at the American Chemical Society Division of Organic Chemistry meeting in San Diego, Calif. Mar. 13-17, 1994 by R. W. Wagner, N. Nishino ...