Stereoselective Olefination Reactions Promoted by Rieke Manganese
作者:José Concellón、Humberto Rodríguez-Solla、Vicente del Amo、Pamela Díaz
DOI:10.1055/s-0029-1216880
日期:2009.8
applied to develop a novel and direct synthesis of (E)-α,β-unsaturated esters or amides and (Z)-α,β-unsaturated α-halo esters and α-choroamides through a Mn*-mediated sequential olefination protocol of aldehydes with dichloro esters or amides and trihalo esters or trichloroamides, respectively. manganese - elimination reactions - stereoselectivity - α,β-unsaturated esters - α,β-unsaturated amides - metalation
Stereoselective synthesis of (Z)-α-haloacrylic acid derivatives, and (Z)-haloallylic alcohols from aldehydes and trihaloesters or amides promoted by Rieke manganese
作者:José M. Concellón、Humberto Rodríguez-Solla、Pamela Díaz
DOI:10.1039/b803449d
日期:——
A Mn*-promoted sequential process directed toward the synthesis of (Z)-α-halo-α,β-unsaturated esters or amides is described. In both cases, the process takes place with complete Z-stereoselectivity. In addition, (Z)-α-chloro-α,β-unsaturated ketones and carboxylic acids, and (Z)-haloallylic alcohols were readily prepared from (Z)-α-halo-α,β-unsaturated amides derived from morpholine, or esters. A mechanism has been proposed to explain the sequential process and the stereoselectivity observed.
Stereoselective synthesis of (Z)-α-halo-α,β-unsaturated esters, and amides from aldehydes and trihaloesters or amides promoted by manganese
作者:José M. Concellón、Humberto Rodríguez-Solla、Pamela Díaz
DOI:10.1039/b717513b
日期:——
Preliminary results of a Mn-promoted sequential process directed toward the stereoselective synthesis of different (Z)-α-halo-α,β-unsaturated compounds are described.
Synthesis of S-alkyl and S-aryl thiocarbamates, one-pot two-step general synthesis
申请人:The United States of America as represented by the Secretary of the Navy
公开号:US06686494B1
公开(公告)日:2004-02-03
A method for preparing S-alkyl and S-aryl thiocarbamates comprising reacting a precursor thiol reagent with trichloroacetyl chloride to produce an S-alkyl and S-aryl trichloroacetyl thioester intermediate, which is reacted with an amine to yield the corresponding thiocarbamate product. Also disclosed is the method for preparing S-alkyl and S-aryl thiocarbamates comprising reacting an amine with trichloroacetyl chloride to produce a trichloroacetamide intermediate, which is then reacted with the precursor thiol to yield the corresponding thiocarbamate product.
vic-Enediamines. Reaction of some tert-β-dichloroalkylamines with lithium-dialkylamides
作者:A. Halleux、H. G. Viehe
DOI:10.1039/j39680001726
日期:——
Instead, the starting β-dichloroalkylamines (7) are reduced to monochloro-derivatives. 2-(1,1-Dichloropropyl)diethylamine (9) yields 1,1-bisdiethylaminopropene (10) by reaction with lithiumdiethylamide. The rearrangement involved is discussed.