Photochemical synthesis of oxime acetates derivatives of 1-carbaldehydobicyclo[n.1.0]alkanes by the aza-di-π-methane rearrangement.
作者:Diego Armesto、Ana Ramos
DOI:10.1016/s0040-4020(01)87986-2
日期:1993.8
1-carbaldehydobicyclo[n.1.0]alkane oxime acetates has been achieved by the aza-di-π-methane (ADPM) rearrangement of oxime acetates of 2-(cyclopent-1-enyl)- and 2-(cyclohex-1-enyl)-2-methylpropanals. Further increase in ring-size affects adversely the reaction and the oxime acetate of 2-(cyclohept-1-enyl)-2-methylpropanal is unreactive by the ADPM path. The low efficiency of rearrangement of 2-(cyclohex-1-enyl)-2-methylpropanal
Stereospecific and Stereoselective Rhodium(I)-Catalyzed Intramolecular [2+2+2] Cycloaddition of Allene-Ene-Ynes: Construction of Bicyclo[4.1.0]heptenes
Treatment of the allene‐ene‐yne substrates with [RhCl(CO)2}2] effected the intramolecular [2+2+2]‐type ring‐closing reaction to produce various of tri‐ and tetracyclic derivatives containing a cyclopropane ring. The reaction is highly stereoselective as well as stereospecific with good to excellent yields.