已经发现三氟乙酸是用于串联克莱森重排和环化反应以从由S N 2反应获得的化合物产生3-芳基亚甲基-3,4-二氢-1 H-喹啉-2-酮的高效和高效试剂。DABCO存在下苯胺与丙烯酸Bayis-Hillman加合物的乙酰基衍生物之间的关系。相反,在三氟乙酸处理下,从Baylis-Hillman丙烯腈加成物的乙酰基衍生物获得的类似化合物通过串联Claisen重排,环化和异构化直接提供3-芳基甲基-2-氨基-喹啉。
Enantioselective desymmetrization of prochiral 1,3-dinitropropanes via organocatalytic allylic alkylation
作者:Soumya Jyoti Singha Roy、Santanu Mukherjee
DOI:10.1039/c3cc47645f
日期:——
An enantioselective desymmetrization of prochiral 1,3-dinitropropanes has been developed which proceeds via enantiogroup differentiating organocatalyticallylicalkylation. Densely functionalized products with two vicinal stereocenters were obtained generally with good to excellent diastereoselectivity (up to >20 : 1 dr) and superb enantioselectivity (up to >99 : 1 er).
Methylsulfenylation of Electrophilic Carbon Atoms: Reaction Development, Scope, and Mechanism
作者:Adriane A. Pereira、Amanda S. Pereira、Amanda C. de Mello、Arthur G. Carpanez、Bruno A. C. Horta、Giovanni W. Amarante
DOI:10.1002/ejoc.201601613
日期:2017.3.27
An innovative methodology for methylsulfenylation of electrophilic carbons is presented. Cheaper and commercially available dimethylsulfoxide (DMSO) is now used as a source of -SCH3 group. Chalcone, dibenzylideneacetone (DBA) as well as Morita-Baylis-Hillman (MBH) adduct derivatives were successfully sulfenylated, giving the corresponding products with moderate to high isolated yields. Control experiments
Electron-Donor–Acceptor Complex-Enabled Flow Methodology for the Hydrotrifluoromethylation of Unsaturated β-Keto Esters
作者:Gabriel M. F. Batista、Pedro P. de Castro、Hélio F. Dos Santos、Kleber T. de Oliveira、Giovanni W. Amarante
DOI:10.1021/acs.orglett.0c03187
日期:2020.11.6
(EDA) complex-enabled flow photochemical hydrotrifluoromethylation of unsaturated β-keto esters is described. The developed protocol has an easy experimental procedure and does not require the use of transition-metal-based photocatalysts, allowing the isolation of 14 new compounds in up to 86% yield. Control experiments and computational studies revealed that the reaction proceeds through a Michael-type
INDOLIZINONE BASED DERIVATIVES AS POTENTIAL PHOSPHODIESTERASE 3 (PDE3) INHIBITORS AND A PROCESS FOR THE PREPARATION THEREOF
申请人:COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
公开号:US20140296530A1
公开(公告)日:2014-10-02
The present invention provides compounds of general formula A useful as potential phosphodiesterase3 (PDE3) inhibitory agents and a process for the preparation thereof. The derivatives of formula A can be employed as therapeutics in human and veterinary medicine, where they can be used, for example, for the treatment and prophylaxis of the following diseases: heart failure, dilated cardiomyopathy, platelet inhibitors, cancer and obstructive pulmonary diseases.
Synthesis of stereochemically defined (E)-cinnamyl alcohol derivatives from the Baylis–Hillman adducts
作者:Hyoung Shik Kim、Tae Yi Kim、Ka Young Lee、Yun Mi Chung、Hong Jung Lee、Jae Nyoung Kim
DOI:10.1016/s0040-4039(00)00229-x
日期:2000.4
The reaction of the Baylis–Hillman adducts 1a–g and trifluoroacetic acid at 30–70°C gave the rearranged cinnamyl alcohols 2a–g stereoselectively in moderate yields.