Asymmetric triple cascade organocatalytic reaction in water: construction of polyfunctional cyclohexene building blocks having multiple stereocenters
作者:Yaomei Jia、Zhifeng Mao、Rui Wang
DOI:10.1016/j.tetasy.2011.11.023
日期:2011.12
An asymmetric triple cascadeorganocatalyticreaction was carried out in water, which led to the construction of polyfunctional cyclohexene building blocks with multiple stereocenters with good diastereoselectivity and excellent enantioselectivity. This asymmetric triple cascade process was found to be quite effective for various nitroalkenes, including those with aliphatic substituents.
Novel Functional Hollow and Multihollow Organic Microspheres: Enhanced Efficiency in a Complex, Heterogeneous, Asymmetric, Three-Component/Triple Organocascade Reaction
作者:Fuqiang Dai、Zhiwei Zhao、Guangxin Xie、Dandan Feng、Xuebing Ma
DOI:10.1002/cctc.201601120
日期:2017.1.9
acid) (PS) microspheres to form core–shell structures, followed by removal of the PS core by etching in organic solvents. The as‐prepared hollow and multihollow microspheres were able to achieve better mass transfer in a complex heterogeneous asymmetric three‐component/triple cascade reaction and provided the products in good yields (31–61 %) with excellent stereoselectivities (80:20–93:7 dr, >99 % ee)
Asymmetric Synthesis of 3-Substituted Hexahydro-3H-isochromenes via an Organocatalytic Triple Cascade/Yb-Catalyzed Hetero-Diels-Alder Sequence
作者:Dieter Enders、Nico Erdmann、Iuliana Atodiresei
DOI:10.1055/s-0031-1290374
日期:2012.7
enantioselectivities (>95:5 dr, >99% ee). An efficient two-step asymmetricsynthesis of highlysubstituted 3-alkoxy-hexahydro-3H-isochromenes and 3-sulfenylated hexahydro-3H-isochromenes is described. The procedure involves an organocatalytic triple cascade reaction, followed by an intermolecular [Yb(fod)3]-catalyzed inverse-electron-demand hetero-Diels–Alder reaction. Using this strategy, a total of six stereogenic
Asymmetric Synthesis of Polyfunctionalized Mono-, Bi-, and Tricyclic Carbon Frameworksvia Organocatalytic Domino Reactions
作者:Dieter Enders、Matthias R. M. Hüttl、Gerhard Raabe、Jan W. Bats
DOI:10.1002/adsc.200700396
日期:2008.1.25
multi-component domino reaction is used as a key process for the stereoselectivesynthesis of polysubstituted mono- and bicyclic cyclohexene-carbaldehydes. Furthermore, the extension of the domino reaction and further synthetic transformations of the cascade products were investigated. The combination of the three-step cascade with an intramolecular Diels–Alder reaction opens up an entry to tricyclic decahydroacenaphthylene
Asymmetric epoxidation, Michael addition, and triple cascade reaction using polymer-supported prolinol-based auxiliaries
作者:Michael C. Varela、Seth M. Dixon、Kit S. Lam、Neil E. Schore
DOI:10.1016/j.tet.2008.08.013
日期:2008.10
either asymmetric epoxidation or Michaeladdition of suitable α,β-unsaturated substrates has been assessed. Epoxidation of cinnamaldehyde in the solid state give poorer yields and stereoselectivities than in the solution-phase systems. In contrast Michaeladditions of several aldehyde enolates to 2-nitro-1-arylalkenes gave results that approached or surpassed those in solution, and could be extended successfully