Facial Selectivity in the Addition of Lithium Dimethylcuprate to 6-Substituted Tricyclo[5.2.1.02,6]deca-4,8-dienones. Synthesis of β-Substituted Cyclopentenones Using Flash Vacuum Thermolysis
作者:Antonius J. H. Klunder、Andries A. Volkers、Binne Zwanenburg
DOI:10.1071/ch14094
日期:——
investigated. It was shown that substituents at the 6-position can either exert a stericeffect or an electronic effect. Steric approach control predominantly giving the endo product was observed for 6-alkyl substituents. Stereoelectronic control could be adequately rationalised using the Cieplak model. Flash vacuum thermolysis was used to prepare a series of β-substituted cyclopentenoids. The sequence leading
Unusual cope rearrangement of tricyclo[5.2.1.02,6]decadienone 2-carboxylic ester on acetalisation with ethylene glycol, PTSA
作者:Subhash P. Chavan、Krishna S. Ethiraj、Subhash K. Kamat
DOI:10.1016/0040-4039(96)01600-0
日期:1996.10
Protection of 2-exo-carbomethoxytricyclo[5.2.1.02,6] deca-3,8-dien-5-one with ethylene glycol, PTSA afforded the unexpected Cope rearranged product i.e. 1-carbomethoxy endo-dicyclopenta-1,4-diene-8-one 8-ethylene acetal, instead of protected acetal 2.