54 research outputs found
Ring Expansion of Cyclobutylmethylcarbenium Ions to Cyclopentane or Cyclopentene Derivatives and Metal-Promoted Analogous Rearrangements
Full text linkChemInform Abstract: POLYSPIRANES. 5. SYNTHESIS AND REACTIONS OF FUNCTIONALIZED POLYSPIRANES WITH A THREE- TO EIGHT-MEMBERED CENTRAL RING - POLYCYCLOPROPYLIDENES ((N)ROTANES)
Full text linkChemInform Abstract: Sterically Crowded Cyclohexanes. Part 6. Conformational Isomerism in a Fully Substituted Cyclohexane.
Full text linkChemInform Abstract: POLYSPIRANES. 6. ATTEMPTED DIRECT HOMOLOGATION OF TRISPIRO(2.0.2.0.2.1)DECAN-10-ONE AND 10-(BENZENESULFONIMIDO)TRISPIRO(2.0.2.0.2.1)DECANE WITH DIAZOCYCLOPROPANE
Full text linkChemInform Abstract: Sterically Crowded Cyclohexanes. Part 10. Synthesis, Conformation and Dynamics of 8,8,13,13-Tetramethyltetraspiro(2.0.3.1.3.1.3.0) heptadecane.
No full textChemInform Abstract: Cascade Rearrangements. Part 21. Mono- and Bicyclic Cyclopentenes by Rearrangement of 1-Methylcyclobutylmethanols: Synthesis of (.+-.)-Cuparene and Formal Syntheses of (.+-.)-Laurene and (.+-.)-Herbertene.
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A new approach to helical primary structures of four-membered rings: (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane
No full textA new approach to helical primary structures of four-membered rings uses a cycloaddition of a trimethylenketeniminium salt to suitable tailored methylenecyclobutanes to assemble the desired carbon framework. The results are short and effective syntheses of (M)-trispiro[3.0.0.3.2.2]tridecane [(M-5], and (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane [(P)- and (M)-24]. Unlike helices of three-membered rings, the specific rotation decreases, as the length of the helix increases. (C) 2003 Elsevier Ltd. All rights reserved
ChemInform Abstract: Towards a Synthesis of (.+-.)-Modhephene via Cascade Rearrangement: Synthesis and Rearrangement of Dispiro(3.0.4.2)undecanes (IV) and (VIII) to (3.3.3)Propellanes (V) and (IX).
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