Enantioselective synthesis of valproic acid analogues
申请人:——
公开号:US20020156320A1
公开(公告)日:2002-10-24
This invention employs camphorsultam as a chiral recoverable auxiliary to provide a new method for manufacturing valproic acid and valproic acid amides that facilitates the enantioselective or diasteroselective production of valproic acid analogs on a larger scale.
Versatile Synthesis of Polyfunctionalized Carbazoles from (3-Iodoindol-2-yl)butynols via a Gold-Catalyzed Intramolecular Iodine-Transfer Reaction
作者:Benito Alcaide、Pedro Almendros、José M. Alonso、Eduardo Busto、Israel Fernández、M. Pilar Ruiz、Gulinigaer Xiaokaiti
DOI:10.1021/acscatal.5b00471
日期:2015.6.5
3-iodo 2,4,6-trisubstituted 9H-carbazoles has been developed by starting from (3-iodoindol-2-yl)butynols. These results could be explained through an initial 6-endo-dig alkyne carbocyclization by chemo- and regiospecific attack of the C3-indole position at the external alkyne carbon followed by a stepwise 1,3-iodine transfer and dehydration. This reaction outcome for the gold-catalyzed transformation
A Novel Synthesis of 1,3-Oxazine-2,4-diones via a Simple and Efficient Reaction of CO<sub>2</sub> with 2,3-Allenamides
作者:Guofei Chen、Chunling Fu、Shengming Ma
DOI:10.1021/ol9009046
日期:2009.7.2
A simple and efficient reaction of CO2 with 2,3-allenamides under mild conditions (CO2 balloon without any metal catalyst in the presence of K2CO3 or Cs2CO3) leads to an efficient synthesis of 1,3-oxazine-2,4-diones. The high reactivity of the allene moiety is crucial for the success of this transformation since the corresponding reaction of alpha,beta-unsaturated alkenamides or alkynamides does not occur.