13670-84-3Relevant articles and documents
Highly Regioselective Monoalkylation of Ketones via Manganese Enolates. Prepared from Lithium Enolates
Cahiez, Gerard,Chau, Khi,Clery, Patrick
, p. 3069 - 3072 (2007/10/02)
Li-enolates are readily converted to Mn-enolates by treatment with manganese halides.In THF, the reaction is easily and economically performed with manganese chloride at room temperature.Mn-enolates can then be regioselectively monoalkylated in good yields.The formation of di and polyalkylated products is never observed (1percent).
Preparation of 1,3-Diketones and of Nitro-diketones by (1:1)-Acylation of Lithium Enolates with Acyl Chlorides
Seebach, Dieter,Weller, Thomas,Protschuk, Gerd,Beck, Albert K.,Hoekstra, Marvin S.
, p. 716 - 735 (2007/10/02)
Slow addition of precooled solutions of lithium enolates in THF to solutions of equimolar amounts of acyl chlorides in the same solvent at temperatures between -80 and -100 deg furnishes 1,3-diketones in acceptable to good yields.Even 3-nitropropionyl and 4-nitrobutyryl chloride can be employed for the (1:1)-acylation of enolates to give the synthetically useful 5- and 6-nitro-1,3-diketones 13 and 25, respectively.The scope and the limitations of this method of preparing 1,3-diketones are given and are compared with alternative methods.
