Efficient Stereoselective Syntheses of Constrained Glutamates via Michael-Induced Ring Closing Reactions
作者:Christian Schmidt、Uli Kazmaier
DOI:10.1002/ejoc.200700965
日期:2008.2
ester enolates are highly efficient nucleophiles for the synthesis of conformationally constrainedglutamatesvia domino sequences of Michael additions and subsequent ring closures (MIRC). This protocol allows the generation of 3–6-membered ring systems in high yields and excellent diastereoselectivities. Depending on the reaction conditions either carbocyclic or heterocyclic ring systems are obtained.
Synthesis of Highly Functionalized Proline Derivatives via a One-pot Michael/Aldol Addition-Cyclization Approach
作者:Uli Kazmaier、Christian Schmidt
DOI:10.1055/s-0028-1088150
日期:2009.4
enolates undergo Michael addition towards halogenated α,β-unsaturated esters in a highly stereoselective fashion. The enolates formed can be trapped with electrophiles such as Baylis-Hillman-type acrylates in a stereoselective fashion, before subsequent cyclization gives rise to substituted proline derivatives. Up to three stereogenic centers can be formed in this one-potreaction.
Synthesis of Highly Functionalized Proline Derivatives via a One-Pot Michael/SN′-Addition/Cyclization Approach
作者:Uli Kazmaier、Christian Schmidt
DOI:10.1055/s-0029-1216862
日期:2009.7
β-unsaturated esters in a highly stereoselective fashion. The enolates formed can be trapped with electrophiles such as Baylis-Hillman-type acrylates in a stereoselective fashion, before subsequent cyclization gives rise to substituted proline derivatives. Up to three stereogenic centers can be formed in this one-pot reaction. amino acids - Baylis-Hillman - chelates - cyclization - Michael addition - one-pot
Bunce, Richard A.; Irwin, Derek A., Synthetic Communications, 1990, vol. 20, # 19, p. 2979 - 2982
作者:Bunce, Richard A.、Irwin, Derek A.
DOI:——
日期:——
Efficient Stereoselective Syntheses of Cyclic Amino Acids via Michael-Induced Ring-Closing Reactions
作者:Matthias Pohlman、Uli Kazmaier
DOI:10.1021/ol034777j
日期:2003.7.1
[reaction: see text] Zn-chelated glycine ester enolates are highly efficient nucleophiles for the synthesis of trans-methoxycarbonylcyclopropyl- and cyclobutylglycines by domino sequences of Michael additions and subsequent ring closures. They react to give the anti isomers with high yields and excellent diastereoselectivities.