Desymmetrization of gem ヾimethyl groups en route to rhodiumヽatalyzed enantioselective sp 3 C〩 amidation is reported. Synthetically important b ゛mino alcohol derivatives were accessed in moderate to good yields and high enantioselectivity. The high enantioselectivity is enabled by an appropriate oxime...
Metallocene and other transition metal complexes activated by methylaluminoxane are highly active catalysts for the polymerization of olefins, diolefins, a... W Kaminsky - 《Journal of Polymer Science Part A Polymer Chemistry》 被引量: 216发表: 2010年 Polymerizations of olefins and diolefins cataly...
The electrochemical treatment of solutions containing 4-chloro-2-methylphenoxyacetic acid (MCPA) concentrations up to 370 ppm in the pH range 2.0–6.0 and ... Boye,Birame,Brillas,... - 《Journal of Electroanalytical Chemistry》 被引量: 94发表: 2003年 ...
GPL-3.0 license News First release of gemBS-rs, a complete rewrite of the gemBS pipeline (apart from the mapper) in Rust bringing increased stability while maintaining the high performance of gemBS:https://github.com/heathsc/gemBS-rs.git ...
methyl group, R 3 , R 4 , R 5 and R 6 each represent a hydrogen atom, an alkyl or cycloalkyl group having up to 10 carbon atoms, and from 10 to 100 parts by weight of a compound (ii) of the formula wherein R 1 represents a hydrogen atom or a methyl group; m is an ...
Fluorodesilylations of fluorophenyltrimethylsilanes with elemental fluorine: discovery of a novel 1,2-migration of the trimethylsilyl group The main product in the direct elemental fluorination of 4-fluorophenyltrimethylsilane was 1,4-difluorobenzene, produced by the ipso electrophilic substitu... Alison...
6. A compound of formula (I) according to claim 5 or a pharmaceutically acceptable salt thereof wherein: R1a, R1b are each independently hydrogen, methyl, ethyl, or together with the atom to which they are bound, may form a cyclopropyl group; A is phenyl or a pyridyl group; R4 is hyd...
The preferred monomer (1) is methyl alpha cyano acrylate. Examples of monomer (2) are 2,4-dicyano-but-1-ene, a 2- methylene glutaric acid diester, or an itaconic acid diester. The amount of (2) is preferably 01-60 wt. per cent of the total of (1) and (2). A polymerization ...
This carboxylate group is effective for chelation to a Pd center, enabling the distal alkenylation of electronically unbiased internal alkenes in the formation... S Tsai,Y Huang,C Chou - 《Advanced Synthesis & Catalysis》 被引量: 0发表: 2023年 ...
These results also indicate that the 5-methyl group, its stereochemistry and the 1C4-conformation have important roles as major factors for potency and specificity. The Journal of Antibiotics Role of gem-diamine 1-N-iminosugars Y Nishimura HO O Ref. 16,17 O TBDMSO HO OH O D-Ribono-γ-...