摘要:
Substrates (such as cycloalkalnes, polycyclic hydrocarbons or aromatic compounds having methyl or methylene adjacent to their respective aromatic rings) are converted into oxides (such as ketones, alcohols or carboxylic acids) through oxygenation in the presence of an oxidation catalyst system comprising an imide compound of general formula (1) (such as N-hydroxyphthalimide) and a co-catalyst containing an element selected from the group consisting of group 2A elements of the periodic table, transition metals (group 3A to 7A, 8, 1B and 2B elements of the periodic table) and group 3B elements of the periodic table (except phosphovanadomolybdic acid) (wherein R?1 and R2¿ are each hydrogen or a substituent such as halogen, or alternatively R?1 and R2¿ may be united to form a double bond or an aromatic or non-aromatic 5- to 12-membered ring; X is O or OH; and n is 1 to 3).
摘要:
The present invention relates to an oxidation catalytic system which comprises an imide compound and a co-catalyst comprising a compound containing a Group 7A element of the Periodic Table of Elements, and a compound containing a Group 8 element of the Periodic Table of Elements. The present invention further relates to a process for oxidation which comprises the step of contacting a substrate with oxygen in the presence of said oxidation catalytic system.
摘要:
Substrates (such as cycloalkalnes, polycyclic hydrocarbons or aromatic compounds having methyl or methylene adjacent to their respective aromatic rings) are converted into oxides (such as ketones, alcohols or carboxylic acids) through oxygenation in the presence of an oxidation catalyst system comprising an imide compound of general formula (1) (such as N-hydroxyphthalimide) and a co-catalyst containing an element selected from the group consisting of group 2A elements of the periodic table, transition metals (group 3A to 7A, 8, 1B and 2B elements of the periodic table) and group 3B elements of the periodic table (except phosphovanadomolybdic acid) (wherein R?1 and R2¿ are each hydrogen or a substituent such as halogen, or alternatively R?1 and R2¿ may be united to form a double bond or an aromatic or non-aromatic 5- to 12-membered ring; X is O or OH; and n is 1 to 3).
摘要:
A process for upgrading to essentially 100% enantiomeric excess the optical purity of an organoborane intermediate represented by the formulae: wherein Icp is isopinocampheyl and R * is a unsubstituted or substituted, acyclic or cyclic alkyl having from 4 to 30 carbon atoms, comprising the steps of hydroborating cis- alkene, a trans-alkene or a tertiary-alkene with monoisopinocampheylborane or diisopinocampheylborane, obtaining a solid organoborane and recrystallizing the solid organoborane to obtain an enantiomeric excess of essentially 100% ee of said organoborane.
摘要:
The invention provides derivatives of bornane-3-spiro-1′-cyclopentane with woody note scent useful as a base component in perfumery formulations which comprises those having a substituting group selected from a methoxyl, ethoxyl, formyloxyl and acetoxyl groups or two of substituting groups being either a hydroxyl group and a methyl group or a hydroxyl group and an ethyl group at the 2-position synthesized by any of the reactions of bornane-3-spiro-1′-cyclopentan-2-ol or bornane-3-spiro-1′-cyclopentan-2-one with any of the reagents selected in accordance with the substituting group(s) to be introduced. The invention also provides perfumery compositions containing the above.
摘要:
The present invention relates to anhydrous solutions of MX 3 •z LiA in a solvent, wherein M is a lanthanide including lanthanum, or yttrium or indium; z > 0; and X and A are independently or both monovalent anions, preferably Cl, Br or I. The solution is readily prepared by dissolving or suspending MX 3 or its hydrate and z equiv LiA in water or hydrophilic solvents, or mixtures thereof, removing the solvent under vacuum and dissolving the resulting powder in another solvent. The solution of MX 3 •z LiA can advantageously be used e.g. in addition reactions of Grignard reagents to ketones and imines. Even the catalytic use of MX 3 •z LiA is possible. Also claimed are a method for preparing the anhydrous solutions, the use of such solution in a chemical reaction and chemical compositions MX 3 •z LiA, with M, z, X and A as indicated above.