A new robust methodology for gram-scale iron-catalyzed cross-coupling between alkyl Grignard reagents and alkenyl or aryl halides is developed. This method does not require toxic additives such as NMP or expensive ligands. Its efficiency relies on the use of simple alkoxide magnesium salts as additives. On the basis of these results, a new procedure for one-pot synthesis of substituted benzamides from
The cross-coupling of aryl arenesulfonates with dialkoxyboranes proceeded in the presence of Bu4NI and a catalytic amount of [Pd(dba)2]/1,1′-bis(di-tert-butylphosphano)ferrocene, giving good yields...
A practical and sustainable synthesis of arylsulfonate esters has been developed through electro-oxidation. This reaction employed the stable and readily available phenols and sodium arenesulfinates as the starting materials and took place under mild reaction conditions without additional oxidants. A wide range of arylsulfonate esters including those bearing functional groups were produced in good
[EN] A PROCESS FOR PREPARING BENZO[B]THIOPHENE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE BENZO(B)THIOPHÈNE
申请人:HEXAL AG
公开号:WO2011047877A1
公开(公告)日:2011-04-28
The present invention relates in general to the field of organic chemistry, and in particular to the preparation of benzo[b]thiophene derivatives. These benzo[b]thiophene derivatives are useful as intermediates in the synthesis of pharmaceutically active agents such as raloxifene or derivatives thereof.