The iodine/DMAP-mediated intramoleculartandem C–C/C–O bond forming reaction of malonate bearing alkene moiety proceeded to give bicyclic lactones with good diastereoselectivity in good yield. The mechanistic investigation was also discussed on the basis of various control experimental results.
作者:Angus W.J. Logan、Jeremy S. Parker、Michal S. Hallside、Jonathan W. Burton
DOI:10.1021/ol300625u
日期:2012.6.15
Manganese(III) acetatemediated oxidative radicalcyclizations have been used to synthesize a range of densely functionalized and sterically congested cyclopentane-lactones. A number of the resulting lactones contain vicinal all-carbon quaternary stereocenters adjacent to a tertiary benzylic stereocenter and are formed with high levels of stereocontrol.
Short total syntheses of the avenaciolide family of natural products
作者:Sandra Ainsua Martinez、Martin Gillard、Anne-Caroline Chany、Jonathan W. Burton
DOI:10.1016/j.tet.2018.06.028
日期:2018.9
of natural products are small α-methylene bis-γ-lactones that exhibit a wide variety of biological activities. Herein we report concise syntheses of five members of this family of natural products along with the synthesis of one non-natural analogue. The syntheses proceed in five or six steps from simple, commercially available compounds and feature a key oxidative cyclization/lactonization reaction
Bicycloheptane substituted ether prostaglandin analogs are provided having the structural formula
wherein X is O or
, and including all stereoisomers thereof.
The compounds are cardiovascular agents useful, for example, in the treatment of thrombotic disease.
双环庚烷取代醚前列腺素类似物的结构式为
其中 X 是 O 或
,并包括其所有立体异构体。
这些化合物是心血管药物,可用于治疗血栓性疾病等。
Aminolithiation–arylation consecutive cyclization of N-(2-fluorophenyl)methylaminoalkylstyryls giving aryl-substituted pyrido[1,2-b]isoquinolines
Aminolithiation-arylation tandem cyclization of N-(2-fluorophenyl)methylaminoalkylstyryls proceeded smoothly to give hexahydro-2H-pyrido[1,2-b]isoquinoline using a stoichiometric amount of n-BuLi with high trans selectivity. The arylation reaction was highly accelerated by the addition of HMPA. Both pyrido- and pyrrolo-[1,2-b]isoquinoline were successfully constructed by this tandem reaction. (C) 2018 Elsevier Ltd. All rights reserved.