This search combines search strings from the content search (i.e. "Full Text", "Author", "Title", "Abstract", or "Keywords") with "Article Type" and "Publication Date Range" using the AND operator.
Beilstein J. Org. Chem. 2019, 15, 333–350, doi:10.3762/bjoc.15.29
Graphical Abstract
Scheme 1: Representative strategies for the formation of alkylidenecyclopropanes from cyclopropenes and scope...
Scheme 2: [2,3]-Sigmatropic rearrangement of phosphinites 2a–h.
Scheme 3: [2,3]-Sigmatropic rearrangement of a phosphinite derived from enantioenriched cyclopropenylcarbinol...
Scheme 4: Selective reduction of phosphine oxide (E)-3f.
Scheme 5: Attempted thermal [2,3]-sigmatropic rearrangement of phosphinite 6a.
Scheme 6: Computed activation barriers and free enthalpies.
Scheme 7: [2,3]-Sigmatropic rearrangement of phosphinites 6a–j.
Scheme 8: Proposed mechanism for the Lewis base-catalyzed rearrangement of phosphinites 6.
Scheme 9: [3,3]-Sigmatropic rearrangement of tertiary cyclopropenylcarbinyl acetates 10a–c.
Scheme 10: [3,3]-Sigmatropic rearrangement of secondary cyclopropenylcarbinyl esters 10d–h.
Scheme 11: [3,3]-Sigmatropic rearrangement of trichoroacetimidates 12a–i.
Scheme 12: Reaction of trichloroacetamide 13f with pyrrolidine.
Scheme 13: Catalytic hydrogenation of (arylmethylene)cyclopropropane 13f.
Scheme 14: Instability of trichloroacetimidates 21a–c derived from cyclopropenylcarbinols 20a–c.
Scheme 15: [3,3]-Sigmatropic rearrangement of cyanate 27 generated from cyclopropenylcarbinyl carbamate 26.
Scheme 16: Synthesis of alkylidene(aminocyclopropane) derivatives 30–37 from carbamate 26.
Scheme 17: Scope of the dehydration–[3,3]-sigmatropic rearrangement sequence of cyclopropenylcarbinyl carbamat...
Scheme 18: Formation of trifluoroacetamide 50 from carbamate 49.
Scheme 19: Formation of alkylidene[(N-trifluoroacetylamino)cyclopropanes] 51–54.
Scheme 20: Diastereoselective hydrogenation of alkylidenecyclopropane 51.
Scheme 21: Ireland–Claisen rearrangement of cyclopropenylcarbinyl glycolates 56a–l.
Scheme 22: Synthesis and Ireland–Claisen rearrangement of glycolate 61 possessing gem-diester substitution at ...
Scheme 23: Synthesis of alkylidene(gem-difluorocyclopropanes) 66a–h, and 66k–n from propargyl glycolates 64a–n....
Scheme 24: Ireland–Claisen rearrangement of N,N-diBoc glycinates 67a and 67b.
Scheme 25: Diastereoselective hydrogenation of alkylidenecyclopropanes 58a and 74.
Scheme 26: Synthesis of functionalized gem-difluorocyclopropanes 76 and 77 from alkylidenecyclopropane 66a.
Scheme 27: Access to oxa- and azabicyclic compounds 78–80.
Beilstein J. Org. Chem. 2011, 7, 717–734, doi:10.3762/bjoc.7.82
Scheme 1: General reactivity of cyclopropenes in the presence of gold catalysts.
Scheme 2: Cationic organogold species generated from cyclopropenone acetals.
Scheme 3: Rotation barriers around the C2–C3 bond (M06 DFT calculations).
Scheme 4: Au–C1 bond length in organogold species of type D.
Scheme 5: Gold-catalyzed addition of alcohols or water to cyclopropene 8.
Scheme 6: Gold-catalyzed addition of alcohols to cyclopropene 10.
Scheme 7: Mechanism of the gold-catalyzed addition of alcohols to cyclopropenes.
Scheme 8: Synthesis of tert-allylic ethers from cyclopropenes and allenes.
Scheme 9: Oxidation of the intermediate gold–carbene with diphenylsulfoxide.
Scheme 10: Gold, copper and Lewis acid-catalyzed reactions of cyclopropene 18.
Scheme 11: Mechanism of the Lewis acid-catalyzed reactions of cyclopropene 18.
Scheme 12: Gold-catalyzed rearrangement of vinylcyclopropenes 25.
Scheme 13: Gold-catalyzed rearrangement of cyclopropenes 27 to indenes 28.
Scheme 14: Gold-catalyzed rearrangement of cyclopropenes 29 to indenes 30.
Scheme 15: Gold-catalyzed rearrangement of cyclopropenyl ester 34a.
Scheme 16: Gold-catalyzed reactions of cyclopropenyl esters 34b–34d.
Scheme 17: Gold-catalyzed reactions of cyclopropenylsilane 34e.
Scheme 18: Gold-catalyzed rearrangement of cyclopropenylmethyl acetates.
Scheme 19: Mechanism of the gold-catalyzed rearrangement of cyclopropenes 39.
Scheme 20: Gold-catalyzed cyclopropanation of styrene with cyclopropene 8.
Scheme 21: Representative reactions of carbene precursors on gold metal.
Scheme 22: Intermolecular olefin cyclopropanation with gold carbenes generated from cyclopropenes.
Scheme 23: Gold-catalyzed formation of trienes from cyclopropenes and furans.
Scheme 24: Gold-catalyzed formation of trienes from cyclopropenes and furans.
Scheme 25: Gold-catalyzed formation of trienes from cyclopropenes and furans.
Scheme 26: Gold-catalyzed cycloisomerization of cyclopropene-ene 59.
Scheme 27: Gold-catalyzed cycloisomerization of substituted allyl cyclopropenyl carbinyl ethers 62a–62f.
Scheme 28: Gold-catalyzed cycloisomerization of cyclopropene-enes.
Scheme 29: Gold-catalyzed cycloisomerization of cyclopropene-ynes.
Scheme 30: Formation of products arising from a double cleavage process in the gold-catalyzed cycloisomerizati...
Scheme 31: Gold-catalyzed cycloisomerization of cyclopropene-ynes involving a double cleavage process.
Scheme 32: Gold-catalyzed reaction of cyclopropene-ynes, cyclopropene-enes and cyclopropene-allenes.