Organomanganese (II) reagents XIX. Acylation of organomanganese chlorides by carboxylic acid chlorides in THF: A clear improvement in the field of the preparation of ketones from organomanganese compounds
作者:Gérard Cahiez、Blandine Laboue
DOI:10.1016/s0040-4039(00)70699-x
日期:1989.1
Organomanganese chloride reagents react with carboxylic acid chlorides, in THF, to give the corresponding ketones in excellent yields. The reaction is of broad scope, it is very interesting from practical and economical point of view since organomanganese chlorides (in THF) are the most stable and cheap organomanganese reagents. With methyl, aryl, alkenyl and s- or t-alkylmanganese chlorides, the acylation
Organomanganese (II) reagents XVI1: copper-catalyzed 1,4-addition of organomanganese chlorides to conjugated enones
作者:Gérard Cahiez、Mouad Alami
DOI:10.1016/s0040-4039(00)99434-6
日期:1989.1
Copper-catalyzed conjugate addition of organomanganese chlorides to conjugated enones in THF, at 0°C, leads to the 1,4 addition products in high yields. The scope of the reaction is very large and the results are generally better than those obtained from organomagnesium compounds in the presence of a copper salt as well as from organocopper or cuprate reagents. Furthermore organomanganese chlorides are indisputably
The reaction of organomanganese reagents such as RMnX, R2Mn, R3MnLi and R3MnMgX with cyclohexenone has been studied. Two major pathways have been observed : conjugate addition and β reductive dimerization. Similar results have been obtained with organomagnesium compounds in presence of a catalytic amount of manganous salts.
Organomanganese (II) reagents XV. Conjugate addition of organomanganese reagents to alkylidenemalonic esters and related compounds
作者:Gérard Cahiez、Mouad Alami
DOI:10.1016/s0040-4020(01)81312-0
日期:1989.1
Organomanganese reagents react with alkylidenemalonic esters or related compounds to give the conjugateaddition products in good yields. Several examples illustrate the scope and the efficiency of this reaction
MANGANESE-COPPER-CATALYZED CONJUGATE ADDITION OF ORGANOMAGNESIUM REAGENTS TO a,b-ETHYLENIC KETONES: 2-(1,1-DIMETHYLPENTYL)-5-METHYL-CYCLOHEXANONE FROM PULEGONE